head bolt bulge in runner?

Len,
I also did it with a set of 915's in the ported form verses the Eddy's ported. The last 2 sets of flow #'s are the comparison. I just put the MP heads to show that there is another way other than the eddy's, and they were less cost for the same amount of air flow. I would bet that with a good gasket match and some bowl work that the MP heads would be close to the eddy's in ported form or just under. Where as the eddy's were fully ported the MP heads would still have some left.
I used the MP heads because they were close in intake cc's and exh. cc's and chamber cc's, they both used the same size valves. These were the cc's that I came up with.

MP head
Int. 161
Exh. 63
Chamber 64

Eddy head
Int 169
Exh. 64
Chamber 62