Just thinkin' ahead. I have a 63 D100 short box with a decent running, but tired, Poly 318/4speed. I've been casually looking for a big block bellhousing to accept the pass side slave cylinder just like it has now. Did the big blocks have the same slave setup and are there any still out there and what years to look for? Also, will the 318 flywheel work with a steel crank 440? I'm not gonna yank the 318 till it gives me trouble, just collecting parts at this point. Thanks

I know at least some did. I have a BB bell that came from a 68 dodge dump truck that had a 361 or 413 with the pass side cylinder. I never mocked it up against an engine, but it looks like it is used with a crank that has an extended flange, and wouldn't fit with a normal style 6 bolt crank flange...

The flywheel will work for balance and is drilled for either an 11" or 12" B&B or diaphragm pressure plate.

It's got a lot of teeth, cant remember how many but it's way more than 140.

I just had the engine out of my '64D100. I replaced the stock 11" original disk with an 11.5" Schiefer disk and 12" McLeod pressure plate that I got for next to nothing. It's something like a 2800 lb clutch and I have no problems with pedal effort, although it is noticeably harder than the original.

One other thing: When disassembling, remove the seat and the trans tunnel cover to get better access to everything. Pull the transmission first. Then, unbolt the four motor mounts and the engine and bellhousing come out together. The bellhousing weighs a ton and wraps around the flywheel, easier to take off when the engine is out. The transmission will not pull out, bolted to the engine. I found out the hard way.


R.

Is the spline count 10 on the trans? Where can one find clutch discs and pressure plates nowadays?

I may have the bell housing you need...if you are going to try and keep it looking stock.....I'll try and get a part number off of it....it might be for the extended crank too...not sure.

You are probably going to need the parts from a 67-68 383 truck. After that they went to a mechanical clutch. Some of the larger trucks may have used a hydraulic clutch later.

Just realize that the BB truck bellhousings are only drilled for the truck transmissions, they won't work with an 833 4-speed. If you do want to use an 833...you can use a car bell but making a simple adapter bracket to put a truck hyd slave on the car bell housings to operate the clutch. There is one bell that is drilled for both truck and 833 4-speeds, but they are rare and hard to find. Look on brewers website for bell housing applications and part numbers.

Here is the 61-68 BB truck housing. This takes the 172T fly wheel

Here is the late super hard to find BB 833/435 housing

Input shaft is 10 x 1 1/8" This is actually a pretty common size, a lot of chevies have this, as well as the B&B or diaphragm clutches.

You could just go straight to Centerline and buy the whole Dual Friction setup. I did it another way, cheap parts collected on the 'bay over the years. The disk was advertised as a 10 X 1 1/16, which is ford size, imagine my disappointment when it was the wrong one for that job! But it works great on the NP420.

I vote for Centerline DF if you can afford it.

R.

My '64Dog had the 172 tooth flywheel and the NP420, it is only synchronized in Third and Fourth.

R.

Industrial BB's used an extended crank hub on the rear, it was also an 8 bolt pattern but with a different spacing than a HEMI.

OP, I have my '64 D100 318 4-speed truck apart right now if you want pictures. But you gotta respond fast, I'm supposed too be driving it this weekend!

R.