71 Dart with 904 - trans blanket or sheild?

My 71 Dart is a street/strip car. Has gone low 12s - high 11s. I am currently adding a Dana 60 and roll bar so I can go Procharger. Hoping to go low 10s.

I have heard that the trans blanket keeps a lot of heat in the transmission. Will a sheild fit without modifying the floor? If so what are some good brands? I'm doing Drag Week again this year so I'm just worried about trans Heat on the long drives between tracks.