3.75 stroked 305

Big bore... perhaps really not that accurate, I was referring to the 4.00 inch bore variety of the SBC.

And the rest of what you say about opinions is correct everyone has one.  Do you think it would be more efficient to use a stroker kit to make a 300hp 300lbft 305 engine, than to upgrade a standard 305 using some of the incredible variety of parts available for the 350 as also previously suggested?  

Depends on what one considers effient, dollar wise, labor wise, enginuity wise, etc. My "opinion" consists of three options which are easily doable: Weiand supercharger setup off of ebay, stroker kit, change engine brands. Changing engines is probably the easiest if he could find a rebuilt and or low mileage Buick 350. Reason being is that parts are still available if a rebuild is needed 150,000 miles down the road, they are the lightest V8, they are somewhat compact. More to come later.  

i wouldnt go with the buick. what if he wants to put some money into it later. buicks dont enen compare when talking about aftermarket parts. this guy doesnt sound like a supercharger is for him.  

I would love a supercharger, but the power and the height of the motor would be a huge problem. Plus it is not allowed in the rules.

I am going to reuse this motor. Before I did this swap, I did almost go with a 301.

I wouldn't consider using a stroker a lot of work, just don't know if it would be worth the effort. I can clearance the block myself, but I would have to get it balanced.

The 300hp isn't my goal, it is just the max that I would want to run.  

I wouldn't change to a different GM motor now. It is too late to even consider that. It would require too many parts just to make the change. Plus finding a Buick motor would be next to immpossible, let alone one cheap.  

Rebuild it with some flat top pistons and a stock rotating assembly. Look to world products for some aftermarket 305 heads,use the 67cc chamber, or have your stockers cleaned up(not my first choice).  Use an Edelbrock Performer intake, or a a quality dualplane of your choice, don't go too big.  Check out a Comp 255 DEH 12-207-2 and a 500-600 cfm carb.  Use some 1 5/8 headers and your choice of exhaust and you should get pretty much get what you want.  You can easily accomplish 240-250 hp and 320-340 lb ft with this set up using off the shelf components.  This set up would be a smooth idling stump pulling set up that you would make all of it's power before 4500 RPM's without stroking it or changing to a different set up.

By the way what is the application?  

+1, a lower cc-head will give you alittle more compression. if you wanted to.  

The motor and truck in question.

http://i776.photobucket.com/albums/yy44/jeepguy8294/010.jpg

http://i776.photobucket.com/albums/yy44/jeepguy8294/006.jpg

http://i776.photobucket.com/albums/yy44/jeepguy8294/010-2.jpg

http://i776.photobucket.com/albums/yy44/jeepguy8294/009.jpg

http://i776.photobucket.com/albums/yy44/jeepguy8294/008.jpg

It is used for mud racing.

I already have a carb, intake, and headers. Plan on a comp XS256S and reworking the stock heads. I am going to port them, and have them cut for 2.02s and 1.60s.  

will 2.02's & 1.60's fit in the small 305 bore?
how much are the valves shrowded if they do fit?  
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the red-headed step-child of the mailing list

fuzzy dice, air shocks & N50's rule

1.94/1.50 valves are the biggest that will work on a 305 I would recommend the 58CC world products torqer 305 heads.  
Professional hi-performance engine builder

Horsepower sells Engines and torque wins races.

scramblerguy:
What do you guys think of a stroked 305. I know it will increase low end torque, but I think that might mess with the stroke/bore ratio too much.

Anyone tried this?

The original poster seems to flip flop on this matter. Then when a easy solution is suggested, 2.02/1.60 heads on a 305 pops up. As far as a Buick 350 swapped in place of the 305 being difficult, I don't believe you speak from experience. I did the swap and it was easier than you may think. Read my thread, Buick 350 into C10. I do admit that performance parts are not a Buick 350 strong point but the original poster did not mention anything about performance parts in the beginning.

Regardless, like the one poster said, basic performance parts will wake up the 305 without stroking it. What about some Vortec heads? Have you looked into those?  

I didn't know the 2.02s and 1.60s didn't work with a 305. Didn't put that much thought into it yet.

The Buick swap would be easy, but not cheap. New motor mounts, new headers, reroute part of the exhaust, new intake, and get an HEI for a Buick. I would also have to rebuild that motor anyway. I might also have to get a new clutch and possibly a flywheel. There is no need to replace well over a $1000 in new parts, only to waste more money on a Buick.

I thought about Vortec heads, but those are not easy to come by, especially for a 305. I would also have to drill and tap holes for the intake I already have on the motor.  

I agree, if you got the manual trans thing going on then that swap would not be cost efficient. Sounds to me like your down to doing a distributor and carb tune and thats it. What is this for, mud drags?  

It isn't really mud drags. The event I built it for is only once a year. I am building it based on their rules. In the class I run in, it is more like whoever makes it farther. I think once I add a locker, I should atleast place, but more than likely 1st. The class I am in isn't very competitive, so it should be an easy win. I will also run it in 2 county fair races. And if I can find some trails, it will be on them too.

This 305 is staying, but I am just thinking about my options when the time comes to rebuild it.  

nice truck...eh, er, jeep...

and vortec heads and non-vortec intakes are in no way shape or form compatible with each other...the ports are differently shaped...not just different bolt pattern

spend the money working on the heads that fit your combo and leave the stroke alone, especially if 300hp is a maximum number...

take the money saved to put a locker in both ends, there won't be many places you can't go...even first in competition if it's really not that competitive...yet...you kinda let the cat out of the bag...and four rooster tails really grabs the crowds' attention

racing is racing...if you can't put it to the ground, you're just wasting rubber  
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the red-headed step-child of the mailing list

fuzzy dice, air shocks & N50's rule