I have a 78 f150 4x4 with the 400 and c-6. I am looking to convert it to manual. I can get cheap parts from a manual 79 f150 4x4 with a 300-6. I assume the clutch pedal and slave cylinder will be the same no matter the engine. But what about the transmission? Can the transmission be used with a different bell housing? Should I take the transmission cross member from this truck?

I would like to be able to go on long trips with the truck. The c-6 puts my engine wide open on the highway. Would a manual from the time period have the same top end? What transmissions came in these trucks?

I can also get a early 90's zf-5 which is behind a 460. I can also get the transmission cross member and transfer case although I'd rather keep the cast iron np205. If I go this route I could just swap the 460 too.

That's a lot of questions in one post. Thanks for your help in advance!

 

Slave cylinder only used w/a hydraulic clutch. No F100/350 of this vintage came with a hydraulic clutch.

4 speed with 4WD: Could be either a New Process 435 or Warner T-18.

With 4WD, be prepared to spend time/money finding all the correct parts, then spending more time/money installing them.

Brake pedal is specific to 2WD or 4WD, A/T or M/T, with or without speed control, and...

1973/79 F100/350: There are TWENTY TWO different brake pedals, NINETEEN different P/B boosters, SEVENTEEN different master cylinders, SEVEN different clutch pedals!

 

So a truck with a 300-6 4x4 can have either a t-18 or np435 and would both of those work with a 400? (Except the bell housing?)

that is too many pedals! I could get all three from the same truck if needed. The brake pedal in my truck says "man trans" on it, thought that was odd

So I am guessing all 73-79 trucks had cable operated clutches?

If I buy a np435 will my old cross member work?

Thanks a lot!

 

the 3rd gear is 1:1 on the C6, probably the same in the manual 4 speeds. The ZF5 has an OD. The cost of the swap, might be better to get a gear vendors...

 

You need a manual for your truck as you are doing a lot a guess work. No the 73 /79 never had a cable operated clutch it was a rod linkage .

 

A 70's era 4- speed will not reduce your highway rpms at all. C-6 third gear = 1:1 ratio. 4-speed 4th gear = 1:1 ratio.

 

What in the world?

You're planning to swap in a 4 M/T in place of a C6 and you don't know how the clutch is operated?

First you said it was hydraulic (slave cylinder). That would be just ducky if you had a 1984/96 F150, but you don't.

Now you're guessing it's cable controlled. It's not!

The only 1973/79 FoMoCo vehicles that use a clutch cable are Pinto/Bobcat, 1974/79 Mustang/Capri, 1978/79 Fairmont/Zephyr & Fiesta.

Here's the setup...you'll need all these parts including the 01508 brake/clutch pedal support bracket...pictured at right.

And...whatever M/T brake pedal you get...must match your P/B booster. Since there are only TWENTY TWO of these pedals, shouldn't be too much trouble finding the correct one!