The mounting flanges are different thickness. Just use a file to get them the same. Also when you put them on the engine you will need to grind a little off the bottom of the intake manifold. Mr. Offenhauser and Mr. Fenton probably didn't speak to one another very often.

There is enough alum. there to grind, just take a little off at a time.


Tommy
59 apache 1/2t
261 short stepside