Are the automatic and manual transmission mounts the same? The mount I got with the trans is the same as the one that was on my c6. I can make it work but it doesn’t line up right.

 

I think they are the same. I re-used the C6 mount but I had to move my crossmember to make it mount up. Mine was a ZF5 so I knew it was going to be off a couple of inches. I think I read the NP435 may be closer but it will also depend on which C6 you have. There are two versions in the 4x4 truck, one with a short tail housing and one with a longer tail housing. Mine (79 F-250) had the longer one. I learned this the hard way by buying a used C6 and then finding out about the different lengths. I worked on a 77 F-150 recently that had the shorter version so I’m not sure which trucks had longer vs shorter. My trans mount and the others I’ve seen look just like yours.

 

I guess I will just make what I have work.

 

All OE type starters for a 70's 460 will use the same starter since they all were in front of an automatic.

If you shop for a PMGR starter like they used on the 460's in the 90's, they will be offered for either a manual or an auto.

Here's a link to Rockauto for a 92 F250 with a 460. You can see how they are listed for one or the other and they each have different part numbers. I can't tell you the physical difference though as I haven't had both of them in my hand at the same time.

https://www.rockauto.com/en/catalog/...ter+motor,4152

It really is going to come down to what flywheel you have. I have an internally balanced 460 in my 78 Bronco and I used a flywheel kit from L&L. I was able to use the same starter that I had on the 351m that was in my Bronco originally. Same starter, same bellhousing, same transmission, different engine and flywheel.

You'll also want to make sure you have the engine block plate that goes between the bellhousing and the engine block. It's only like an 1/8" thick, but that may make all the difference with your starter and the flywheel lining up. I used the same one I had on my 351m.




Edit: Here's a pic of my engine block plate, just in case you don't know what one looks like. Just covering everything, don't take anything personally.

 

I don't know if the tranny mounts are the same between autos and manuals, but here's the engineering ID stamped into the manual mount that's on mine. I was cleaning it up and took a pic, because ya never know.

 

Your drive shafts might need some work too. I know on a F250 4x4 the transfer case ends up being moved forward some but the bolt holes were already there for it. Transfer case linkage might need some work too.
There are 2 different starters as far as Auto Zones remans go. One has 1/2" throw and one has 3/4" throw but for some reason they don't have different part #'s for the 2. Whatever is in the box is what you get unless you ask to see more. The 3/4" smashed right into my ring gear and got torn up quickly so I use a 1/2" throw starter on my 460 with Fords billet flywheel and even with the current starter I still have it shimmed a little with a cut out from a old rear engine plate.

 

Flex plate for a 460 is 14.23" diameter, that never changed in the pickups from what I can find in the aftermarket. So a late gear reduction starter for an auto 460 truck will work on an early auto 460 truck. I have one off a '96 on my late externally balanced '79. On the manual trucks there appears to have been two different flywheels, again based on the aftermarket, one for the 4 speed trucks and one for the 5 speeds. One shows 180 teeth and the other 184 teeth. This changes the pitch of the teeth. The pitch being different will mean using the wrong starter may fit too tightly and kill bearings. Depth is also different auto vs manual.