how to make a 6.1 spin safely 7500 rpms?

A std 340 with cam, intake and headers aint ever gonna see 425 hp without thorogh rebuild and quality components.

Apply the same theory to the G3

A std 6.1 with cam and headers will make 450hp and a 6.4 over 500hp.

The.engines are different era's and the quality factory machining and casting is far superior to the old LA engines.

Yep a large range of G3 factory engines are let down by pistons and rods but factory cranks are well up to handling 1000hp and blocks up to 1500hp. Try that with factory 340/360 stuff.

The G3 offers the average hot rodder the ability to bolt together an engine from factory parts and make lots of power without any out of the ordinary machining or custom parts.

Get a 6.4 engjne, slide in a 274 comp cam and fit a dragpak manifold and nice carb and you will see high 10's in a 3000lb dart with the ability and reliability to drive across county thats not something you can do with a 340