A T-"x" is no good behind a big Pontiac. Low-end torque will tear it right up. Agreed, though, IF one NEVER drives it "hard", it has a fighting chance. The T-5 IS a little better than the T-50, but not a lot.
I've seen several with the TKO-900 swap. Seems to be holding up behind the big Pontiac. Nice "kit", too. Everything fits as advertised, at least in a 2nd gen car. I'm sure the 1st gen "system" is as sorted.
The Richmond unit is the stronger offering available today.
Any way you "slice it", it is going to cost some money...
