building a 306
 

I have a spare block that I’m having bored out to a 306, is there anything special I should have done to the block, crank? Should the stock rods be replaced? Is there one piston better then the other? What’s the difference between forged and Hypereutectic pistons? Any help you guys can give would be great. what i am adding to the motor is a e303 cam. new roller timing chain, gt 40 P heads, and a air gap manifold with a 650 holley double pump carb.

Re: building a 306
 

I'd align bore/hone it too. Have the crank turned, no more then .010 undersize.
If it's a street car without NOS, Super/TurboCharger Hypereutectic will work OK. Anything wilder or NOS go with Forged.

You can have your rods redone [sized and better rod bolts] or buy a set already done.

Re: building a 306
 

anything with boost and nitrous, only forged. Only one of them in minimal amounts then u could run the hypers.
Ryan