My '66 had the same combo as u, and I could go 130 before I hit 5,500. That was with 185 70R14 tires. I put on 225 70R14 tires, and it changed to about 130 at 4,500rpm.
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'84 mustang GT turbo
'85 LTD
'89 Camaro Irocz z28
'94 Lightning
'96 Trans am
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