318 combo Any issues IYO

With the stock converter and 2.76 gears it will be a total slug!

At a minimum you'll want a LOT more compression. Start with KB167 pistons and a more reasonable cam like a Lunati 10200703 (the Eddy RPM cam isn't all that great).

Also seems a bit of a shame to spend the cash on those heads and intake and then strangle it with a 650.