hey guys, i plan on making a trip to pick'n'pull in va pretty soon and if i happen to come upon some gt40 or gt40p heads/intake, what do you think theyd charge me based on your experience? also, how much would it cost me to have these heads rebuilt? and how hard is it to port and polish at home? i think if i can figure out how id just do the intake and not mess with the heads. Would i also need larger injectors (or just steal them off an explorer ie 22lbs injectors on em ) Thanks alot guys!!
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1994 Mustang GT 5.0
Mods to date: T5 swap, MGW shifter & Composite race knob, Ram clutch, flowmaster cat back system, BBK o/r h pipe, BBK equal length headers, BBK cold air intake
In the process of a gt40 install along with 4.10's and some other new goodies
If I'm not mistaken, the intake from a later explorer is a cobra intake, ie: GT-40. It just doesn't look the same outside. Gt-40P heads are the way to go. W/O the proper tools, porting those cast iron heads are going to be a bear.
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1990 7-up Limited Edition #1764 of 4103. S-Trim, Edelbrock heads P/P'ed, GT-40, Cam gear drive, 1.6 RR's, Custom Iskenderian camshaft, MSDBTM, March, K&N, ARP studs, "C" springs, Koni's, Mega bite jr's, KB chassis strengthening and sway bars,
Griffin, MAC, Mor-flow, Dynomax, Torsen diff, Moser 31 splines, T/A girdle, 255 walbro, T-Rex, Lakewood, TKO, Centerforce dual friction, billet flywheel, Pro-5.0,FMS Alum D/S, 6 pt rollbar, Harwood, feature car rear deck spoiler,(race/sports cars don't have luggage racks), ROH, Michelin, FMS disc conversion, Leather Cobra Daytona seats, Autometer. Runs like a muckin' funky. May 2000 MM&FF feature car " Green Dream"
Without knowing what to do as far as porting goes, you can really screw up a set of heads. I suggest looking up David Vizard's porting guides. Just Google his name. Might even look into buying one of his CD's if your really serious about this.
The intake runners have a certain shape to them, they are desinged with a taper that lets the air speed on the Pushrod Pinch side move faster than the short turn side, this way they both reach the back of the valve at the same time. There is a lot of to consider and learn when porting. Get it wrong, and you have a Fugged up set of Door stop, or wheel chocks.
If your gonna try your hand at porting, use some junk E7 heads, or some other kind of Junk Heads. With out some sort of Flow bench to actually test the results, its kinda hard to actually tell if you actually did good or not.
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89 Coupe
302- Canfield 195's, Comp Cams 1.6rr, Jay Allen Custom Grind, Systemax Intake, 75mm TB, 75mm Pro-M. 24lbs Injectors, Underdrives, Hooker Super Comp headers, 4.10's
ok :-/ ill keep my hands off porting then...well on the subject of a rebuild? how much would it cost me to get them cleaned up and rebuilt?? what about roller rockers? would 1.7 work with stock cam?? plzzz respond!
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1994 Mustang GT 5.0
Mods to date: T5 swap, MGW shifter & Composite race knob, Ram clutch, flowmaster cat back system, BBK o/r h pipe, BBK equal length headers, BBK cold air intake
In the process of a gt40 install along with 4.10's and some other new goodies
gt40 price and info please?! 
) Thanks alot guys!!
