I was just wondering how much Horsepower you guys think i have after
all these Mods i did. Cobra intake, 65 MM throttle body, BBK EQ Lt headers, AFR 165 heads, Under drive pulleys, Mark VIII electric Rad
Fan, Delited smog pump, Walbaro 255 fuel pump, Mac Cold air intake,
Adjustable fuel presure reg set at 42, Timing set at 14. Still stock Cam
and injectors. Was hoping for around 300, do you think i made it. If
not what do you think i need to add. Many thanks, Aggie.

increasethe cam to a xe270hr or a 15511 crower cam (.512 lift ) and spray it with 100 shot will get ya 300+ hp right now you are probly 270to 280 hp to the tire (best guess)

Just got my July 08 issue of 5.0 Mustang Super Fords. Theres an article
on Cam Shafts, on page 116 it talks about Speed Density Cams. Comp
Cams has a cam # 35-512-8. How much of a H/P gain do you think
there might be by adding this cam shaft. Thanks, Aggie.

idk what is the spec on the cam and we can go from there .

This is how the article reads. The 35-512-8 is for 86-88 speed density
mustangs. This cam with 0.480 inches of intake and exhaust lift and
206 (int)/ 212 (exh) degrees of duration at 0.050 inch, is compatible
with a stock EEC-IV engine management and adds more horsepower
and torque than the OEM camshafts for those particular years. Aggie.