OK, so i called up JE and received 3 different answers as to what pistons i need for my build.

Gen 6 502.

Boring it 30 over. so 4.500 Bore.

but they have given me 3 different part numbers and i would really like some help as to which ones.

http://www.summitracing.com/search/m...re-in/4-500-in

Not sure which rod length and other specs. I want to keep compression as close to stock as possible.

Stock rod length is 6.135 and stroke is 4.00, pick what kinda top you want (Flat top, mini dome,inverted dome etc) and go from there.
I would go with flat tops if under 10 psi of boost, stock had tiny mini domes and inverted dome if 12-14 psi is in your future, Smitty

You sir, Are the man! Thank you!

These are the small domes, should put you in the 9:0:1 to 9.25 range depending on deck height, gasket thickness, chamber size, etc. In general, this is a good piston for a N/A marine engine with iron head. Don't know what you're trying to build though,

http://www.summitracing.com/parts/je...make/chevrolet

Summit will also price match if you call them

JE-258275 Big Block Open Chamber Dome Top

http://www.summitracing.com/parts/je...make/chevrolet

Went with these.

with these rings.

http://www.summitracing.com/parts/jep-j10008-45005

Its a 10 PSI procharged build.

another good piston which is made by j&e is srp..i use them al the time,you dont want a mini dome,,it will give 10.4 to 1 compression with a 118cc iron head..thease will give you 9.1 compression..

BIG BLOCK CHEVY - CHEVROLET 502 REPLACEMENT SERIES - JE Pistons

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