Mine is a front mount. I haven't upgraded turbo's yet, but I will be getting a 76 shortly. Yours is a 4WD? Our setups are very similar minus turbo locations. Did you have that converter in when it was tuned with that setup?

 

My truck is 4wd and I did have the tt3000 in when it was on the dyno both times.

 

Oh ok. I had a looser converter in when it was tuned, and now with the lower stall it over-revs on 2-3 shift. I was worried it had something to do with my graph results. After looking at ours, I guess we are just both out of turbo.