Maybe I will just not use the filler. I don't know if there is anyone with the right equipment to precision hone it or the patience/experience to do it around here. It might be best to leave it alone. I just want to get the most out of what I have.
1979 Mustang coupe, EFI 393, A/A intercooled Eaton m122, 4r70w trans, Megasquirt II, T-top swapped in.
1990 Mustang, 545 BBF, C-4 with brake, ladder bars, tunnel ram with two Predator carbs, solid roller cam, 9", 390/45r15 drag radials.