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See attatchment.

http://www.hypercoils.com/spring-rate-calculator/ Check this out. Somebody fast should plug in their numbers for me and let me know if they come out close to the setup you are running. Anyone know...

http://www.141speedway.com/ Do not post any questions here. go to website for more information.

I hear Yates heads are pretty good. Did you get rid of the roush heads?

What Hoosiers are these?

I would try a 2.42 first or 2.73. Not sure if that gear is available for 8.5? Then run it in Low. You will not find a rear gear tall enough to turn those rpms in 3rd gear.

if you have a ford 9" try 6.00-6.33, if you are running a stock rearend you might have to look into something else.

If I put a spindle on my car that is 2" shorter height from my stock spindle, and the steering arm is 1.5" shorter than stock. What should I expect? Should I change other things in the suspension?

I had same problem on stock 9". Had a bent axle. Put a Moser bearing on axle and problem solved. I had an inner seal, wheel seal and the moser bearing, still got oil out by bearing, but did not leak...