If the price is right, then jump on the parts. A complete engine is not worth huge amounts of money! I have 3 complete set ups including 1 in my 71 429cj Mach 1. A friend of mine has been running a 14 to 1 500 ci cj in his flat bottom for 20 yrs with a 2 bolt main cast offset ground crank at 8000 rpm. Needless to say it is a very nice piece.