I already pointed out the port difference in the last line of my post.  I'm well aware of the differences.

I wanted to keep with "big block" so I left Pontiac out...but if I remember right, CC's BOP shootout had them besting the Olds (though in all fairness...Edelbrock still hasn't figured out that people REALLY want a Performer RPM for the big block...some other company, however, did...as it was in the new product section of the mag a few months back).  The Buick remained king though, again...if I remember right.  

Don't ask why I put your name upfront, it was for the masses.Your name should have been half way down the paragraph regarding the 525.   WIEDER  

This 427 Will Pull About 600 to 700 Foot lbs Torque at 3000 RPM With a small solid roller cam The tall Deck Will Let you go long rod big stroke BIG HP Bild It Im Bilding One!  

This 427 Will Pull About 600 to 700 Foot lbs Torque at 3000 RPM With a small solid roller cam The tall Deck Will Let you go long rod big stroke BIG HP Bild It Im Bilding One! Have fun with it  

Hello, I just joined up here. I'm working on a project involving a 366 I got out of a school bus. I'm swapping it into my '94 Siverado. I'm trying to do as little as possible, and staying stock. I'm not really sure about the year of the engine, but it's got a crazy looking intake, water pump, and throttle body set-up on it.
The truck is mainly used to haul my boat, and the small blocks don't seem to take it very well, broke a piston in one, rod knock in the other on low milage motors. Amazed by one thing, still running around on the rod knock almost a year later, with almost no oil pressure after it's warmed up, but I don't haul anything.
The truck has the 4l80 that I'm swapping out for a ,five speed. I'd prefer to keep with the automatic, and the 4l80 has never let me down, but because the bus was stick, and wanting to keep with original computer for the 366, this just seems easier.
I do have a 700R4 out of an '89 1500, but have little faith in the 700R4s for hauling, even if they're built.
I posted a thread on a Mcleod forum to get some info about flywheels and clutches. Please check it out, http://www.mcleodind.com/forum/showthread.php?p=1716#post1716
Mostly my question there is about counter-balance issues, and purchasing the right setup.
It's good to see that other people out there have done the same thing I want to do. These engines are hard to find info about, and so much of what I read is negative, especially about building them.
I really havn't done any tricked out builds, but a friend of mine put together a few web pages at cardomain, and there's some cool stuff there. I'll leave the link. http://www.cardomain.com/ride/537454
On page 14, I put together a real decent '69 Olds 455 w/ "C" Heads for an 18' "Cobra Jet" jet boat. Cost for all parts, and machine work, about $2100.00. That includes buying a junkyard engine for $300.00 with the "C" heads that were already ported and polished, what a find.
Anyway this is a good thread, and I hope to gain some insite into what I'm doing with the 366, any info is helpful.  

Your issues with the sbc is a common one. In standard build form they just dont have the duty cycle for those heavy loads.A forged crank and forged pistons would get some extra life for it,but it'll never be a BBC.The 366 is a great choice for a guy who want diesel power for half the cash.After all we put them in school buses right.The 4L60 would hold it down just fine less of using an oxidizer.And for all those guys out there in question of the reasonig for a "TALL DECK",dont ya think the big cubers like the 509 & 572 are all tall deck blocks for a reason.Room for reinforced webbings and  longer rods which allow a more correct rod angle.And lets not forget windage.More air in the crankcase is more cooling capacity and less rod angle is less oil hanging on the rods side.Talldecks carry more coolant,so less overheating issues.These are just some of the better reasons for the talldeck BBC's.I could go on for a while but I'll spare it.Small differences perhaps,but arent the little things the way to make the big difference overall...  

Bore X Bore X Stroke X  .7854 X 8 = Cubic Inches Right?
3.90 +.060 = 3.96
3.90 +.60  = 4.50
so i'me curios... 3.96 X 3.96 X 4.50 X .7854 X 8 = 443 Ci
OR maybe
4.50 X  4.50 X 4.50 X 8 = 572 Ci
Or maybe
4.25 +.60 = 4.85(0)so,
4.85 X 4.85 X 4.50 X .7854 X 8 = 665ci
Or,
4.25 +.060 = 4.31 so,
4.31 X 4.31 X 4.50 X.7854 X 8 = 525ci
just curios  

Wow, those are some strange numbers there...

A OE 366/427/454 block cannot be bored to a 4.5" bore, not in a million years!

I don't think there is a block being made today that can handle a 4.85" bore.

A 4.5" stroke would be very tight in a stock block, it's probably do-able but not by much. Also, you need to consider being able to fit an ample connecting rod with that long stroke as well.  

Does anyone know the counter-balance, if any, for the bottom-end on the 366/427 industial engines?
I just got the numbers off the block and heads.
Block: 10069282
Heads: 14092359
I'm guessing it'll be internally balanced because I can see an extra bob on the end of the crank.
I don't know if this is of any interest, but both the heads and block have "HI-PERF" cast into them.  

GibTG yea i was wondering about some of the posters conjectures about how much room there is inside those blocks.and i had to look at some of the math.Ime pretty sure also that theres no block able to go out to 4.85,and what about stability/block integrity when you clearance it to put that amt of swinging metal. some one said they get the tall deck blocks in the aftermarket from these industrial motors, i dont think so,but i may be wrong,the price would not be so high to buy one if thats th case and gmpp would have it in the cat,yes i know theyve got all kinds.
I think were gonna see some exciting things once the e85 gets settled, then if the octain is high woo hoo!  

Car Craft had a feature of a car making over 1,000 horsepower to the wheels with the help of a huge centrifugal supercharger. This person was running E85 but was only running fuel that he had mixed himself...

That is the problem with E85 in performance engines, when you get it out of the pump it may be E88 or E70, you don't really know, and that's bad for an engine pushing the limits of stable combustion.  

Ya itsa shame that the fartcan crowd can get 2-300 horses from a 1.5,to 2.5 litre engine ,using all the tricks and tech out there, and we can get 425 out of a zz383, only. see what ime getting at? at 1.5 litres and say 200 horses on a good day,and natraly aspirated. so and engine at round 6.3 litres 4 times as big,should be running at 800 horses-no excuse. so dont knock the fart crowd for one thing ,their doing what american hot rodders are not,think what would happen if honda came out with a 6.0 litre engine,i imagine it would eat the lunch of every american v8 out there.
look at nissan, the skyline 6 a strait 6- can go over a thousand horses,honda 4's are pushing a thousand horses, no ime not gonna talk about stratospheric rpm factor,coz american "musclecars"did it too,6-7 7500 rpm big blocks only making 500 or so horses,except the hemi it made 800! ZL1 LS6 LT5 4 cam vett motor,all high rpm.
so get out there and make a 10,000 rpm small block with a turbo,running some boost comparable to what a honda rod  would do.and then you'll have some bragging rights
Yes it would cost round a 1500 dollars per thousand rpm,but what price glory?
and if your lucky and win the lotto,go big,build a zz572/620 and boost the wee out of it with twin turbos,and 10,000 rpm
that... would be the ultimate american rod motor.but it wont be done ,ever,coz the 350 ci engine is the bestest most awsumest engine in the history of the universe,and theres no room for any other,or at least if you read any american motor sports related magazine.
ps. the little chevy camaro's and that stupid that thought he could take me off the line,ina vette,gainst my 4x4 ram, sorry buddys,its all about traction, thats why u got spanked by the big bad HEMI dodge this!  

Rotating mass, lots of valvetrain friction, and crappy head design kill the V-8 as we know it. Seems the American auto makers where too worried about the bottom line, and cost cutting to produce the horse per cube that an OHC 4 cylinder will. Not to mention stifling new technologies to keep with current tooling, and for what? They did away with canted valves, Hemi heads, and overhead cams in the sixties, again, why? Racing sanctions probably. Here's another good one, anyone ever heard of the Croate's head?
Combustion engines have been around since before the turn of the last century, it's almost irritating to me to think that this is the best that we could come up with in the last 100+ years.
Well now that I've blogged it up, does anyone know what the counter balance on the 366 is?  

How did talking about tall-deck big block Chevys turn into a rant comparing domestic versus imports and pipe dreams about the world's best muscle car. And since all of this was done by someone who can't use proper grammar, form a sentence, or that has any knowledge of how a performance engine works it was especially frustrating to try to read.

That's enough of that!  

I got the "strange numbers"as you put it ,from the same article that CSIROC found the Power graph for the Oldsmobile 455 engine. Maybe you didnt read that issue?