Benjie85bird

ok i know i have to replace the radiator, and im going to switch to stock gagues because the light never came on to let me know it was over heating. what i want to know is what else ill need to replace. its a 2.8 mpfi that until now has run great(87,000 miles 500 of mine). also how difficult is it to replace it, can i put in a V8 one because i plan to have the v8 built and in by september(when out here in the great white north its too cold to do much in my drive way) thx

ben