GT40P Heads how much hp from them.

Rusty67 said:

I think 69/70 351w exhaust manifolds will clear the plugs properly. If you port those out right they will flow as well as aftermarket headers and wont crack.

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any info on the port work needed for a set of 351w manifolds? i've got a couple sets in the garage i wouldn't mind playing with for the next sleeper project, along with a set D0OE heads that i've been itching to put a portin' on

Melvin's Classic Ford in conyers, GA carries sets for 65-66 mustangs with P heads. They are very nice quality and incidentally fit foxbody mustangs so I would imagine they fit other mustangs as well. Don't remember who made them however . . .

The set I saw at the shop were jet-hot coated and were around $300 or so (shorties).

The only combo off the top of my head was a 88 hatch.
ported GT-40p, ported cobra intake, 65mm BBK, e-cam with 1.7s, longtubes, off-road x-pipe with flowmasters dumped. T5 with 3.73s.

On slicks the car went some low 7.70s right at 90mph. The MPH was there to run a little better but the local track is about terrible.

And as far as D0OE heads, my falcon went some 8.60s at 84 with those heads stock, professional products air-gap, 670 street avenger, b-cam, longtubes and x-pipe with flowmasters.

The car probably made 220 or so rwhp at that point and could have made a lot more had I found out sooner the rib under the rotor was locking out the timing. Went to a dyno later and picked up 20rwhp with just 2 minutes of grinding it down with a die grinder.