The Indy MW gasket is listed as having a 2.650x1.340 port opening, which is the size I make SR or EZ heads when I take them from std port to MW size.

Sounds like the TF270 is MW size to me.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads