hi im rebuilding a chevy 350 30 over and wanna know what are cheap goood pistons. i was lookin at these two.

http://www.summitracing.com/parts/TRW-8KH345NCP30/
what does it mean when it says +5.00cc? and what would my compression be with these?

http://www.summitracing.com/parts/SUM-17350-30/
these ones are +6.00cc? and what about compression with these?

another question i got is are the eagle cranks good. i was gunna buy one for 170 instead of getting my old one redone for the same price.

 

The +5.00cc and +6.00 cc are the volumes of the valve reliefs. You have factor that in to the compression ratio calculation.

Your compression ratio will vary with the chamber size on the heads, what head gasket you use, and the deck height of the block.

 

well what would a rough estimate be with 76 cc heads and stanard deck height.

 

About 9:1