80ECLT,
Waitaminute! Are you saying there's a 4.00in stroke crank available for the 4.3? :shock: At first I assumed that you were thinking with a 3.75in stroke, but my calcs came to 291 C.I. . Man, a 4.06X4.00 would be something else, sort of what I'd expect if the old Pontiac division built V6s.
8)