Well I'm not really having any problems with the car. It runs good, revs fast. I did only get to the track 2 times do to a now ex-girlfriend. Women, I hope someone figures them out someday. lol I was planning on getting to the track a lot more but that's life.
My pinion angle is at 2 degrees with out any shims. I have tried putting a 3 degree shim in but they get so thick on the one end that the locating pin on the springs barely engages the spring perch locating hole. I didn't think it was a safe set up so I stayed with a 2 degree shim. I figured the best would be to put new spring perches on. This is an 8 3/4 that I have already broke once when I first put this motor in. I have a Dana 60 I will be narrowing and building so I just decided to put my effort towards that. Part of my reason for going to caltracs is to get away from a pinion snubber. The bottom of my car where it hits is starting to get beat up. You also only run about 3 degrees of pinion angle (I think?) which is better for the u-joints and street driving.
Here are the specs on my motor: 418.37 cubic in., 9.67 comp. ratio, ported X heads 2.05 int. 1.60 exh. intake flowed 264 @ .500 exhaust 196 @ .500 Cam is a cam motion hydraulic flat tappet 110 lobe center installed @ 106 center line gross lift is .544 with Indy 1.6 roller rockers, duration @ .050 is 246, carb is a Holley 750 double pumper on a Edelbrock RPM airgap that was port matched. Engine dynoed 496.7 HP @ 5700 rpm TQ was 521.2 @ 4500 rpm.
I'm not discouraged. It will get there with some work. Hopefully I can get to the track more this year.
Thanks