Originally Posted by 55 Tony
If your intake manifold is showing 8 degrees, that's WAY off. The intake is normally made at an angle 3° to 5° so when the engine is tilted down in the rear, the intake (and carb) are level. Try leveling the intake and re measuring the transmission with a yoke in it to see what angle you end up with.
This is not completely true...factory manifolds, and many aftermarket manifolds are angled to account for engine tilt in the chassis so as to allow a carb to sit level....but a lot of the racier single plane and air gap manifolds often are not . They figure the engine is being set low and flat in a race chassis and doesn't need any angle compensation for carb mounting /float bowl level.
A lot of those "race" intakes end up on stock location engines.
Originally Posted by greenmonster1970
Thanks Tony.... Im going to do a little testing with the shims tonight and see what I get. Are you saying the intake by itself isnt level across the carb opening?
Depends on the intake.
With a flat cut intake, showing 8° at the carb pad means that if the engine is tilted back up 3° you would end up with the crankshaft centerline near the factory 5° angle.