Here's a list of things that I know that you will need:
-T5 transmission (DUHH!!) These come from 79-93 Mustangs or 85-87 T-bird Turbo Coupes. The 4cyl and 8cyl T5's are geared differently, as is the one from the T-bird.
-T5 shifter (you can modify your original shift handle to mount to the T5 shifter for a stock look)
-Manual 6cyl bellhousing. You already have this if you have a 3.03 The bellhousing will have to be slightly modified to mount to the adapter plate, but it's a 10 minute job with a drill.
-T5 adapter plate to mount the T5 to the older bellhousing and give the proper input shaft spacing.
-9" manual flywheel from a 1968 or later 6cyl 200 (Not a 250) You can use an 8 1/2" recessed flywheel from an early model Mustang, but then you will HAVE to use a 3 finger pressure plate, because they don't make a diaphram type for the 8 1/2" as far as I know.
-Clutch kit for either the 8 1/2" or 9" flywheel (Clutch plate, Pressure Plate, Throwout Bearing) I'm using a later model kit for a 1978 Fairmont to get a diphram pressure plate rather than the early model 3 finger type. But if you do that, you still have to have the early model throw out bearing to match the fork on the bellhousing.
-Pilot bearing
-T5 crossmember with parking brake bracket. (This is a special piece designed to mount the T5 in a classic Mustang)
-T5 yoke (Another special piece designed to mount to a 6cyl driveshaft on a classic Mustang)
With the addition of the adapter plate, the driveshaft may be 1" too long and if so will have to be shortened.
Depending on what you end up paying for the T5, the total conversion can run well over $1K. 8cyl T5's tend to be quite a bit more expensive in the used market than the 4cyl models. The only real differences in them is the gear ratios, and the torque rating. The torque really isn't an issue with our sixes, but the gearing can be. If you have a high ratio rearend, the gearing of first gear in a 4cyl T5 will cause you to wind up first gear while still going really slow. I have a 3.20 rearend, and chose an 8cyl T5 with a 3.35 first gear. Most of the 4cyl T5's have a 3.97 first. Oh and don't get a T5 from a 94 or 95 mustang. The input shaft is longer on those, and they won't work without changing the shaft.
Here's a chart on the different T5 models:
T5 Chart
: Hey everyone, i have a 1966 Mustang with the 200. I currently have the syncronized 3-speed tranny from the later models. Is there a company that makes 4 and 5 speed trannys for the 200? I've been looking everywhere to find nothing except the Dagenham 4-speed. They are rare and expensive maybe i'm looking in the wrong places idk... wanting to know if there is a cheaper way out...thanks
