Small block TrickFlow heads part 1

12many said
Their instructions state that the head bolts or studs/nuts kits they list as items being “required” A need for the flanged reduced bolt head (9/16” hex) or the smaller 12-point nuts for tool clearance is obvious, but I never checked to see if the bolt lengths were the same as the factory bolts. Have you checked the lengths of all the studs your using? I assume they are the correct lengths and it’s just the reduced bolt head/nut size that’s different.

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I plan on measuring them but I didn’t yet as I wanted to get flow numbers, airspeed numbers, and sonic numbers at the pinch and head bolts. I can tell you that my head adapter that I made used a head gasket and studs to center the head. I had to raise the stud on the center row so I’m guessing they require longer studs or bolts.