It's been awhile since I have been on PT and longer since I have posted. I am not the builder of my car and the car has been pushed aside for awhile now. It's time for some forward progress. I know what my builder wants but would like to get everyone's opinion about a rear gear. Have a 1969 Firebird. Will be a street car and would be fun to take it to the nearest road track a time or two (Bowling Green). Will have a Ford 9 inch (DSE), 31 spline, 335/30/18, T56 Magnum and probably 600+hp. I know there are several calculation sights out there to help me with a set up but wanted to hear from all of you. 3.55 or 3.73? Please educate me.
Agreed, I had 3.73 with my t56 and rarely got it into 6th. Ended up going with 4.10, partly b/c going 25 mph in my hilly neighborhood left me right at a point where I was constantly shifting.
The t56 gives you bragging rights, but unless you're putting down tons of power a 5 speed is perfectly fine for street driving and will save you from having to cut the trans tunnel in most cases.