Huh... that is peculiar. My 67 is lower than your 69 and I surely don't have that issue... nor have I had any issues with client cars. In fact, one client at Bonneville last week, that has a 69 and I know that its lower than anyone would ever consider here (its about an inch to the frame rail) doesn't have that issue either.
How are you measuring your shaft angles.. ? How much initial angle do you have in the shaft ends at static ride height ? Do you still utilize the rear spring rubbers... ? What is your rear spring rate... ? What busings and/or rear suspension are you using... ?
What you describe maybe more of a spring control issue... because I do know for a fact that the majority of the off the shelf - after market springs that I have seen in the past twenty years or so... cannot locate the IC well enough to negate the issue that you described.
Not to mention, in relation to your specific application... that with a big block, and the power/torque it can produce... if you are at more than about 2 to 2.5*... that is most likely going to be the larger problem, especially with the flexibility in soft rates springs.
|