Engine build/compression ratio

Ok here we go......A while back i bought a used scat rotating assembly for a 350 SBC, scat crank, scat "i" beam 5.7 rods and a set of .030 over KB silv-o-lite hyperuetectic(how ever you spell it) .150 dome claimer pistons for a build on my lil old grocery getting 70 AMC Gremlin (it already has a 355 in it now but i want more). I have a buddy with a set of freshly rebuilt (7,000 miles on them) 62cc fuelie heads with 1.94/1.50 valves that i could get for a reasonable price.

Could i run this complete set up and still get by on running 93 octane pump gas?

I also have a set of Sealed Power .030 over 4V relief flat top pistons and a set of 70CC heads but the the heads would need to be rebuilt and gone thru.

What would be my BEST route to go to have a fairly wicked little motor and still be able to run it on 93 pump gas? I could run the flat tops and the 62cc heads and have (i think) like a 10.5-11 to one compression motor couldn't i and still get by on pump gas????

Please help i am looking to get started on this motor and can only afford to do it right one time. I want it to be as wicked as possible but still get by with pump gas and maybe a little some CAM2 if needed.
This is not a daily driver but i do like to hop in it and blast it to work every now and then, you all know what that's like!!!

Thanks for any and all help!!!!  

afraid youd be asking for knock problems on that set up,  youd need to at minimum use some octane boost.   but with some lucas top end lube and some boost youd be alright as long as you watch your timeing advance,  might have to give some up.  id suggest a thumper type cam for your intended use.  decent get, and great sound without compromiseing the drive.,  watch your plugs for top end lean out though, have ran similar heads and plug monitoring was critical until the carb was dialed in.  

I didn't do the calculations, but if you are going to run into detonation problems, you are really going to run into problems with the hypertenic pistons longevity in that situation.  
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The Silver Buick- '77 Skylark coupe w/ a Fuel Injected Buick 455&TKO-600, '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428&C6. Needing to replace a '69 Firebird 400.

http://www.bangshift.com/forum/index.php?topic=6189.0

with the 62cc heads and .150 dome = eguals 11.6:1 comp
youd want to run a 230 duration intake cam at .050, or bigger.
waiste of money with factory heads. thats with a .045 piston to head clearance.
would be very doggy in traffic. 2800rpm+powerband.
icky. icky. no...

assuming it's carburated...

next flat top piston 62cc head= 10.637 comp.
now your looking at between a 220-230 duration intake cam at .050.
streetable. rpm'er no bigger cam , it will cost you power. with a factory converter it would be moderatly hard to spin the tires. power band 2400-5500rpm. 12-15mpg. again guessing.

70cc head and flattop= 9.7:1 comp.
probably your safest bet. stay below 218degree intake duration cam at .050
and you should have a solid performer. snappy in traffic, and decent top end.
1500rpm-5000rpm. bonus maybe 18mpg. i'm guessing.

70cc head with dome pistons = 10.5:1 compression.
again 220-230 duration cam at .050 intake.streetable. rpm'er no bigger cam , it will cost you power. with a factory converter it would be moderatly hard to spin the tires. power band 2400-5500rpm.

quality machine work and measuring is very imoprtant, don't skimp if you want it to live.

fast/cheap/reliable==pick any 2 out of the 3...........

idk your drivetrain so milages are a shot in the dark.
honestly with factory heads i'd stay below a 224degree intake duration cam at .050
all your parts perform best in a certain rpm band. try to keep them all within the same range. and you'll be very happy. i.e. no single plane intake, keep header primary pipe diameter below 1 3/4 inches. use long tube headers.  1 3/4 = 220+ duration cam.
1 5/8 or smaller = under 220 duration cam.
factory exuast log manifolds, = under 220duration cam.
650cfm carb. aproximtly.
update your ignition system, if it's HEI get a msd/accel/petronix, pickup.
i'd use platinum plugs. bosch. standerd not the super pricy stuff.
big air cleaner with cold air inlet if possible.

hope that helps.