I don't have much experience on 2 4150's on a TR, but you might not be on the primary circuit yet. Sounds lean. How is the transfer slot exposure? What IFR? Maybe Mr. Thump will chime in.

Faster, Faster until the thrill of speed overcomes the fear of death...

71 Swinger - slowly collecting dust/parts
66 Belv. II - just a streetcar
88 Mustang - turbo LS beater