Intake bolt angle

[turbodave231]

Have you ever noticed that the intake manifold bolt holes are not 90 degrees to the intake manifold surface of the heads?

Doe anybody know the angle specified?

Its not listed in the Buick Motorsports Manual and I need to know.

I am making a fixture to repair these threads. Yes, I know I can measure the angle, but that is also subject to measurement errors.

Working off a measurement also assumes that the head being measure was done 100% to specification (something that never happens in production)

 

[X Ray]

It turns out to be 75 degrees...Thanks Richard Clark

 

[1KWIKSIX]

I see a nice Aluminum TA engine block in the background. Bet some lucky guy is gonna be excited to finally get that installed in his Buick

 

[turbodave231]

Yes, That's the next build waiting in line. There is an equally nice pair of TA heads to go with it!