This is me Stan
Join Date: Feb 2008
Location: King, North Carolina
Well as far as I know, SO 5.0 came with pistons that didn't have valve reliefs; mine didnt, and people I know with em had the same thing.
When swapping to the HO cam, you need to get a Mustang computer also (which is easy), and you'll need to change the firing order to that of the Mustang; they were different between the SO and HO. I also recommend that you grab a 60mm TB and HO upper intake, both of which can be had for dirt cheap.
1988 Thunderbird 5.0L | 240rwhp - 300rwtq
306ci, forged pistons, 9.5:1 compression, GT40 intake, 65mm TB and EGR, GT40Y aluminum heads, 1.7 roller rockers, T5 swap, 3.27 gears
DD - '88 Tbird Turbo Coupe - 99.9% stock