[JLMounce]

I would not just assume pump gas friendly out of hand. If you have the ability yourself cc a couple chambers on the heads to see how big they are. Measure the piston to deck height and plug those numbers into a compression calculator. If you don’t have the ability yourself, have a professional look it over. Spending a couple hundred now could save you several thousand later.

Cam choice plays a role but if you are coming in around 9.5:1 or less, the engine is absolutely pump gas capable.

And yeah you’ll need to temper your power expectations based on the parts it sounds like you have. 800 streetable hp NA is possible on these engines, but it requires more cubes, better heads and typically moderately large roller cams.

if the heads you have end up having the larger chambers, what that does is create an avenue for a streetable boosted application that would get you closer to your goals. An s480 turbocharger will make 800hp without batting an eye and in that setup, you could actually run it with e85 in lieu of an inter cooler.

It does sound like you need to do your diligence in the engine and what you have first however.