351C has the same pattern as the 302 and 351 Windsor. The 351M uses the same bolt pattern as a 429/460.
did the ranchero come w/9in's ? if so ill have a look at that too working on geting a second car so wile the mav is down i can get to work i have a 5.0 ho efi out of a 92 xr7 couger im puting the system in along with the trans out of the ranchero ,trying to get a 9in to go along with the whole packeg going to b a killer ride when im done and while im geting the drive trane done the bodys going to be at the body shop geting that squered away and also just got a set of disc breaks off a 77 at our yard geting the spindles powdercoated cant wait!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ya i can want it done right
351m is the only 351 that will not interchange bells with a 302. All the 351s will interchange many parts, from pulleys to flexplates. Depending on the year of the Ranchero, the front discs/spindles may fit your car. 302s came with 8" rears, 351c 4v and larger came with 9" rears. The 2v Cleveland is a toss up. When equipped with an 8" rear, the gear ratios are often 3.25. So the chunk would be something desired by someone. The Ranchero was also available with Traction Lock. Unfortunately, the rear is too wide to fit our cars. Depending on the year of the car, the frame stands for the engine mounts would be useable in a V8 conversion. I assume you have total access to parts from this donor, that is why the long list.