Keep in mind that many later ‘60s and early ‘70s Le Mans and Tempest of similar weight to the ‘61 big Pontiacs came equipped with a 2-barrel 350 coupled with a TH350 and 2.78 rear.
I had a ‘70 Tempest equipped as such with factory A/C and it got out of its own way no problem.
The TH350 should work fine with the 2.87 rear gear.
__________________
1964 Tempest Coupe LS3/4L70E/3.42
1964 Le Mans Convertible 421 HO/TH350/2.56
2002 WS6 Convertible LS1/4L60E/3.23
|