Just be carefull of the gt40 heads, If they are the 'P' style, or the explorer heads, then you might not be able to get headers for them in your mustang. Not sure. They have a relocated plug that interferes with standard headers or manifolds. The standard GT40 '93 Cobra heads are a perfect fit and an awesome factory heads , but they are rare. Whatever heads you use you need to do some clean up on the ports as they will choke a 331 stroker, Hell they choke a 302. If you DO have GT40 Cobra heads then sell them ( in used condition they are worth upwards of $500 depending on the market. and they have 3 lines in the front of the head. explorer heads have 4 )
Then get some assembled aftermarket heads. Theres a place here in SIMI VALLEY calif
thats selling the GT-40 “TURBO-SWIRL” heads for 800 a pair assembled and he has dozens of them.
Otherwise you might want to put a stock mustang roller,E303 or B303 ford roller cam and just use some pedestal crane cobra roller rockers. You can reuse your pushrods and roller lifters, just make sure there clean and all the rollers are smooth. The Mustang Roller has around .444 lift and I THINK 218 deg duration. The E303 is a higher lift cam with about .498 lift @ 220 deg. Good for auto trans. The B303 has .480 lift 225 deg duration. and likes a man trans, Or 'hot' 2800 rpm convertor auto trans.
For low buck id sell the truck efi stuff on ebay to make a few dollars, then go carb with a nice performer RPM or RPM AIR GAP manifold. Stay away from a single plane as they dont have the torque curve for smooth driveablitity that a dual plane has.
Carb choices run the gamut . Holley 570 avenger, Speed Demon 575, Road Demon 525, Edelbrock 600 or 500, just to name a few .Your selection depends on the cam you choose.
Spend the extra money on some ceramic coated or stainless headers. Uncoated headers will burn the paint off in a week and rust forever till they fall apart in a year or two. ( My experiance.)
Dont forget the transmission or the rest of the driveline, Not saying you have to go out and get all new or high performance, but you have to make sure that everythings in good shape before your push 350hp +into them. I dont think your 6 cly trans will handle a normal 302 let alone a 331 with near 340 ft lbs tq.
Sorry I went off on a tangent, but hope helped some.
71 Pinto,5.0 Roller block,B303,1.7 Rockers,Crane beehives'68 302 portednpolished heads. Cut n re-welded,coated Must II headers,Rpm Airgap,Holley 570,Msd dist steel gear,Crane HI6
"The MONEY PIT"
<font size=-1>[ This Message was edited by: 71hotrodpinto on 5/15/06 12:11pm ]</font>