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This might be a dumb question. But what is the process for changing a clutch on a 1978 f250 with a 400? How hard is it and how long should it take someone? Do you have to drop the transmission?
You should do some research. Yes you need to drop the tranny or pull the motor but the tranny is more logical. Pull the old pressure plate off and the old clutch. I would also take the flywheel off and have it resurfaced or buy a new one.
Mine is an F150 4x4 and it took 2 skilled people 2 long days separated by a week of powerwashing, undercoating, cleaning, painting and putting new seals in the transfer case. Had to cut the crossmember a little with a torch because I couldn't get it out from between the frame. I thought I'd save on the cost of a shop but it probably worked out the same but they wouldn't have cleaned and painted like I did.
I used a Centerforce on mine and it is powerful. It's touchy...either engaged or not engaged with nothing in between. It's not uncommon to chirp the wheels pulling out.
I wouldn't try it alone or without a torch and transmission jack.
Get yourself a manual, that will help most. I have never put a clutch specifically in a dentside truck but I have put them in tractors and other vehicles, its a fairly straightforward, nuts and bolts job. You should have little trouble if you are mechanically inclined at all. The biggest issue is the weight of the trans and T case. As mentioned, rent a trans jack and buy a clutch lineup tool, will save aggravation.
The fastest by far is to pull the engine. A good mechanic can do it by himself in a day.
I would put in a rear main seal while the engine is out.
It will take at least twice as long to pull the trans and transfer case.
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