Don't get the Edelbrock "340" heads. Get the Edelbrock closed chamber 63cc LA engine heads and build a quench combustion chamber engine. I am building a 414" (340 block .020" over) stroker. I ordered the Scat cast crank kit with the KB745 forged step dish pistons:

1-98013BI

It comes internally balanced and Summit's price right now is $1279 plus $11 handling and free shipping. Scat says they guarantee the bearing clearances and balance. Mine will be getting checked out by a local shop. Should be few more weeks before it arrives.

I am building mine as a street engine for pump gas.