Well my son has a "77" F150 4wd. Actually, after noticing some problems with parts and diagrams, it is a 76, 77, 79 and others. Chassis is a 79 F150 4wd, cab is a 77 F150 2wd, doors 76 F100 2wd and motor, well not sure yet. I know the block is a 351 Cleveland, there is an M cast into the left upper corner of the heads, carb spacer came up as being from a 351W. It has been interesting to try and get parts for. And for the amount of RTV they used, I think a gasket set would have been cheaper, but with all the different parts, they might not of know what to buy gaskets for. They didn't have the right carb to spacer gaskets and even used RTV there. But, hopefully the gaskets we got last night will fix the vacuum leak at the carb base and get the thing to idle. The next step will be getting the brakes to work. Now, the pedal sticks when you press it. As ND has told us many times, there are numerous different brake pedals and boosters and these parts need to match. I think they used the pedals from the cab and booster from the chassis. Trying to verify some things with the parts guru nad hopefully have that fixed here soon. Then he has to figure out how to get $700 for new tires. Those 33-12.50/15 aren't cheap. If anyone has a narrower tire size that is about the same height but will fit on the 15x7 rims we have, would be greatly appreciated.

That's enough for today. Will add more years of the trucks parts as we find castings for dates.

 

Could be a cleveland but probably a modified.

 

Yeah - 351M was used in these trucks. Cleveland never was, but that doesn't mean someone couldn't have swapped one in at some point. 351M is much more likely though.

 

One of the POs of my 79 f350 put in a cleveland, put in kijiji to sell it, explained clearly that it's a cleveland. Now I get 3 - 5 emails a week telling me it's really a M or maybe a W and most describe the differences. editing the ad to make it explicit that its a cleveland has slowed the emails to 2 per week.

 

Well the thing about putting a cleveland in is you dont just change the engine. It wont bolt up to the same bell housing as the M. And throw in it being a 4x4 that puts the transfer case into the equation. So you go from a 335/385 series pattern tranny/ transfer case combo to a small block pattern tranny/transfer case pattern. Unless you luck out and find 1 of the mythical so called big block bolt pattern clevelands that are supposedly floating around out there.

 

We have the fuel pump on the left. There are other differences but that is enough. Actually this makes me happy, since I have a nice running 302 in my parts truck.

 

If it is a 351C, it is more likely they used a small block C6 (if it is an auto trans.)

 

Well, probably. Gonna have the boy pull the starter to get block casting numbers, and see for sure. Probably have him do the same on the tranny and transfer case as well.

 

 

The fuel pump on the left is for a C or M block. They're the only ones with bolt holes at 12 and 6 o'clock.

The "M" casting on the heads means those are M block heads......8 valve cover bolts.

 

I don't think any one said this, if so I apologize, but you can put Cleveland heads on an M block. Most would say that it is preferred. With the exception of the casting numbers on the block, the Cleveland has 2.75" crank journals while the Modified (Midland) has 3" crank journals. I don't know this to be a fact, since I have never rebuild a Cleveland, but I have read numerous articles on the interwebs that say the same thing (to me, this makes the M block better and stronger). It was said that the Cleveland has the small block tranny pattern, sorry but I am fairly confident that they never made a Cleveland with a 335/385 tranny pattern. Look at the bolt pattern of the tranny pan, if it's a C6 then you have an M block with possible Cleveland heads , if it's a C4 (say, from an early bronco with a D300 t-case ) then it's possible that you have yourself a Cleveland all together. Worst case scenario, You have the same as the majority of us and have a complete Modified engine with a C6 tranny and a Dana 20 t-case. I'm interested to see what you have. Keep us posted.

 

There were small block pattern c-6 trannys built. I dont recall off the top of my head what the measurement is but you can measure the top 2 tranny to block bolts centerline and tell whether you have a C or an M.

 

Yeah. I kinda forgot about the small block C6 when I wrote that. Did they come in the 4x4 version?

 

As far as I know they were only in cars, but I dont know everything. I have never seen 1 in a truck in my 40 years of driving and working on vehicles.

 

Wouldn't it just be a matter of switching the tailshaft housing / etc to mate any C6 to the transfer case?