I have a 302/5.0 HO in my 64 1/2 Mustang that came out of a 93 stang with 37K miles. For the most part the engine is stock. I did put a E303 cam with Edelbrock RPM manifold with 4 barrel carburetor. I would like to change the heads and get the most bang (HP) for the bucks. The engine runs very strong, but I would like to have a few more horses under the hood. I really don't want to mess with the bottom end, but anything else goes. Thanks in advance for any ideas you might have.
I had essentially the same setup as you except for EFI... the engine made 231 rwhp.
Now it's been stroked to 331, AFR165s, 1.7 roller rockers, E303 cam and EFI. It does 107.5 MPH in the quarter mile. I don't have actual dyno numbers yet, but according to Virtual Engine 2000, it should be about 313 rwhp / 356 SAE hp.
AFR 165s are a bolt on, the 185s have 2.02" intake valves and may require notching your pistons... Both RHS and AFR suggest the 1.94 intake valve on a 302.
'68 Highland Green, custom built tubular chassis, Fox rack & pinion steering,'89 HO/331, Cobra intake, E303, AFR 165 heads / T5z spec transmission,
8.8" rear end w/ 3.27, Auburn limited slip, triangulated 4 link, QA1 coil overs front and rear, Cobra 4 wheel Disk brakes. '01 Silver Bullit wheels.
Was a coupe, now with a fastback roof. First run 13.3 @ 107.
Best head I would say afr165. Best bang for the buck would be gt-40 or gt-40p, if they will work with your exhaust. Both of these are iron not aluminum like the afr. Me if I were spending the money on heads I would splurge for the afr's, unless I found a great deal on some used gt-40's
67 Fastback,,t-5, 289 edelbrock performer heads, edelbrock f4b intake,holley 650 dp,comp cams 31-226-3, factory air and powersteering.
+1 on the 165's. That is what I am running and they work great. I put down over 400 at the wheels when I had my original tune. I only took it up to 5200 rpm and that was with a vacuum leak on the intake. I think I should be about 430 now that it runs good. I chose the 165's because I did not want to notch the stock pistons and I will not spin it to the rpm's that the 185's will give me a big benefit. I also have an E cam. Good choice on going with the 165's!
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