[Gaz64]

I'd put it on as is.

8 inches at idle, rule of thumb is halve manifold vacuum at idle (8/2=4) then pick the next lower opening point.
Which you have done at a 3.5 valve.

I'd recommend Pink cams on both in position one, like most performance Double pumpers.

Factory settings:

4778 has 66/71 mains, 25/32 pump nozzles.
4778-1 and -2 have 66/76 mains and 28/31 pump nozzles.