Keep in mind that a lot of the V-6 parts will work well with a V-8. The front K-member is the same, the trans bell housing bolt pattern is the same, but you will have a problem with air cleaner clearance if you use the stock hood. The stock V-6 gears in the T-5 are ok for cruising around, but they suck on the freeway. I ran 3.73 rear gears and a TKO 600 transmission, and never had any power problems.
Hell, I plan on using even more V6 parts for my car than for your average V8 swap!
I believe I can just use a V6 5-speed PCM to work the speedo, fuel gauge and all of the lighting. Along with that, I'll use a V6 gauge cluster and relay module.
I think that I can use a bellhousing from a V6 car, as well an 11" clutch... as long a I use a 164 tooth flywheel for a 5.0 5-speed 88-96 Ford F150. Read more about it here.
Use 89 F150 Flywheel With 164-teeth With A V6 T5 Bellhousing & V6 T5? | Mustang Forums at StangNet
As for the transmission, a factory spec T5 (for V8 cars) has about a 300 ft. lb. torque capacity, and I expect my 302 motor to make about 300 hp at the flywheel. Just bolting a junkyard fresh T5 into my car will probably not yield good results. So I plan on buying a junk T5 out of a 94-98 V6 car (for the bellhousing, gear-driven speedo, and availability), and getting it rebuilt with some stronger components to hold the power.
I mostly plan on driving the car around in the city, but I do
plan on some highway driving. Will the gear set in the V6 trans be spinning the motor too fast when driving on the highway? I found a spec sheet comparing the V6 and V8 gear sets, and they don't seem to be too different from one another.
94-95 Mustang 5.0 3.35 1.99 1.33 1.00 0.68
94-98 Mustang 3.8 3.35 1.93 1.29 1.00 0.73
I won't be doing any transmission work for at least another year or two (it's the last major step in my build), but I would love to have any more advice you may have concerning what I'm doing with my car.
EDIT: Actually, I think I might rebuild my transmission with a V8 gear set. Looking at the numbers and thinking about them, the V8 gear set has lower 2nd and 3rd gears, which will get the car going more quickly. 5th gear (overdrive) is higher for the V8 than the V6, and that will translate to a lower-revving engine on the highway. A V8 gear set will probably work better for my car, thank you for pointing that out.
---------- Post added at 12:29 AM ---------- Previous post was at 12:02 AM ----------
Awesome job so far. I'm curious, are you replacing the suspension with v6 parts or v8 parts to handle the additional weight? Are you going to be adding back in the factory ac and all the modern amenities?
I'll be getting some SVE springs (basically Eibach Pro-Kits at a lower price) for the suspension very soon. I do plan on reusing my original V6 sway bar though. V6 sway bar is 27 mm. GT sway bar is a thicker 30 mm.
As for the HVAC, no heating or air conditioning for this build. I won't be driving this car in the winter to warrant any heat, and the AC would need to much money and work to become operational again.
Power locks will be gone. The power driver's seat will be converted to a manual seat. I will keep the power steering, brakes, and wipers for street performance reasons. The power windows will be my only source of cool air, so they will be reused for now. I hope to eventually be able to convert to manual windows just like my buddy 93Bandit did.