I have a 94 GT convertible (summer driver) stock block with 85k that I've owned for 14 years. I have a cold air intake, Bassani long tube headers, Bassani X pipe, deleted cats, Dynomax side exhaust, Performance Automatic Transmission, 3.73 gears, stall converter (don't remember to much on it), car was also tuned, but I also don't know too much about it, it was all done 10 years ago. The car was bogging out with no power recently so yesterday I changed the distributor to MSD Pro Billet, MSD Ignition Coil, Ford Racing wires, Ford stock copper plugs, changed the fuel filter, checked the fuel pressure (ok), changed my 2 O2 sensors, swapped back and forth MAF sensors with a new one (mine is fine), changed the oil 10w 30 Mobil 1 synthetic, ran some Seafoam threw gas tank & brake booster, cleaned the throttle body, checked for vacuum leaks (Can't find one) After doing all this I thought I marked the timing well with the distributor but I guess it was off because I had little power and a burning smell after taking it for a ride. After I twisted the distributor a little and got better timing my car woke up but I'm going to use a timing gun today. The engine and car still shake at idle (sounds also like I have a aftermarket cam, which I don't) even though I did all the other stuff, I've read it's more then likely the Harmonic Balancer so I'm going with the Powerbond PB1084-SS to hopefully fix that issue. After doing all this stuff I want to give the car some more power but I'm on a tight budge now and my car is pretty quick off the line but that's about it, no high end HP. I'm looking for a upper & lower intake manifold off a 94-95 Cobra (Best Looking IMO) and I've been reading threads to have Tmoss port the lower. How much should I pay for the manifolds, and where is a good place to locate them, because I'm not finding very many on eBay or Car-Parts and I'm thinking $250-$300 for the set? I'm also looking at a 70mm BBK throttle body and have been reading about GT40 heads. I know the GT40P heads won't fit with my headers but if I get the 8-302 (5.0L), ID F67E-BA off a 97 Explorer listed on Car-Parts which I believe is a regular GT40, will they bolt right on and do they have the rear ports for the air pump if that's needed (or is that pre 94 only)? What needs to be done to them, port & polish, new valves, springs, do I need 1.7 roller rockers? If there is a better alternative for heads if to much stuff needs to be done to the GT40 what is it? Would it be the right choice to get a cam also, I've read getting a Steeda #18 or #19 if that's correct is the best choice for 94-95 Mustang GT. What's the most economical way to wake up my heavy Stang?