I'd keep a V-8 in it. Too much trouble in the long run, IMHO. Find a decent running 350 & then rebuild your 455. 3.23's would be a great gear all-around for any V-8 you go with. The T-400 trans would be a bit too much with the 6 cylinder, it will pull down the power a bit. The T-400 is a heavey duty trans & would be overkill on the 6. Too many things you would have to change & alter to go with the 6.
