For anyone interested in photos or intake port sizes. Here you go. Stock, these intake and exhaust ports are taller than most other heads.
The intake entrance roof was raised .06 to 2.17. The width at the bulge is 1.09 and the stock entrance width was left alone. The raised roof was blended to the stock roof height above the apex of the short turn, which is 1.59. The width of the port at the apex is 1.54.
A two angle valve job with a 30 degree seat and a 60 degree undercut is used. The bottom of the 60 degree cut is 1.82 inches in diameter. The bottom of the bowl is 1.64 wide.
The short turn radius was reshaped to a .86 radius and moved back toward the intake flange as explained in Jim H's book. Thank you Jim for further explaining that to me.
The intake port volume measures 176 cc's.
First photo is the ported exhaust along with the milled only intake port. The exhaust ports in the other two photos are stock. Note the chamber shape of this 1967 061 head. I did mill the chamber floor because some of the valves were sunk, but the original chamber shape is retained.
|