Need someone to educate me on 5.7's

gen3 is no different today than any other engine combo to build. ditch the heads and get a newer eagle set of heads for 400ish a set complete. rockers are the same so they can be used if the newer eagle heads don't come on them.

you can buy drop in rods n pistons for the 5.7 if your staying normally aspirated otherwise get a stroker kit and machine work. valve spring kit and a cam shaft will set you 900ish. cant see why 6k would not get you close to running and 500hp with ease.
the eagle heads require the newer valve covers and coils. both can be had for a few hundred or so. look better and the eagle heas flow [email protected] stock anf the heads you have flow [email protected] and have valve drop issues. eagles will bump the stock short block you have compression wise pretty high above 11:1+. but if you get pistons you can get them for the eagles heads. same motor just different combustion and intake openings. your heads have 83cc and eagles are 65cc combustion chambers.

forgot 6.1 roller lifters to eliminate the mds are findable for reasonable amount. ive got a set forsale for 150 low mileage even.
hope this gives you an idea. any questions just let us know.