Completely agree with Tom H. Leave that engine back there! Makes the best-handlilng cobra out there. When you get built up, try a couple of laps on a skid-pad (watch that
oil pressure, though!) You will be amazed---with 295s out back and 255s up front---you don't under- or oversteer---you just "add radius"! I discovered some interesting things when aligning (REaligning) my rear axle. I had a problem with large-diameter Hoosiers. They were rubbing the seat backs! JAMO had actually WORN THROUGH the front of the wheel-wells!!!! I discovered that Butler had added 1" to the wheelbase ---the cars actually have 91.5". I added a 3/4"-thick aluminum pad DIRECTLY in front of the Jag ccenter section (the drive-shaft splines were sufficiently "buried" to allow that). PRESTO----no tire-rubbing and a 92+" w/b!!! Just two inches more than the original 427 S/C but those two inches are indeed welcome. Give it some thought!
Freddie D.