240ZMan said:

I have a similar situation (cam etc), even with a 4.11 as I also live above 6k feet altitude. After 2nd gear, I never drive below 2k rpm - engine just isn't happy. From 3k on though, that's another story

thats exactly it. i'm sure i COULD drive it under 2k but its no fun, 3k is where my motor is happy too :laugh:

Thanks for your help everyone. Now, where does one find the best deal on a rebuilt 5 speed transmission. And where could I find a rebuilt/ good 3.7 differential, r-180 prefferred? (my ideal set up will be a "77"/ "79" trans with a 3.7 r180 diff) But I may have to work with what I can find.