dmw56
Busted and Rusted on Route 66
the 290, 343, and early 390 had one deck height and smaller head bolts, the 304, 360, late 390, and 401 had a taller deck height and bigger head bolts. check your intake to make sure that it will fit, if it is the 290 -390 the middle intake bolts will not fit to the newer heads and the ports don't quite match and vice versa. i know they look the same but there not.
odie![]()
Yes, forgot to mention that. It's also very easy to tell which size engine you have the cubic inch is cast in the side of the block. I won't go into differences of the crank flange because that is way too confusing!!