Hey Guys

I have two GM marine #14093638 5.7 blocks with #14096217 heads and #14096242 high rise intakes with Holley 715 double pumpers just removed from my 32' sport cruiser.(replacing them with turbo diesels)

I am doing a frame off of my 81 4 speed vette and want to build a decent sb around 300 hp. The heads are good for 300, I know. Any suggestions for the rest of the components to get me there?

Also, I am thinking of putting the other engine into my 90 Cadillac brougham (now has 307 ). What can I do to boost the Caddys git up n' go and still keep it dignified