I'M NOT SURE HOW TO EDIT THE TITLE, BUT THE ENGINE IS A 351 CLEVELAND, NOT A 351 WINDSOR! Sorry. I'm looking at buying a 1979 F-250 4x4, but I don't want to keep the 400 that's in it. The guy also has a 351C for sale for $500. I would like to use this in the pickup but will it bolt to the original 4-speed? I do not know the model. Also, will it be enough power/torque for the truck? Thanks.

 

Nope. Different bellhousing bolt patterns. The 351C uses the Windsor pattern, the 400 uses the M-block pattern. Keep the 400 or get a different transmission.

 

The 351C has huge valves/intake ports and it's one of the worst gas hogs. Stick with the 400. I'm sure in that configuration it will burn plenty of gas too but not as much as the 351C. I owned a 73 Mercury Cougar for a while that had the low compression 351C and it averaged 10mpg. I also owned for a couple years a 74 Ford stationwagon that had the 400. After recurving the distributor ignition advance i was getting 16mpg on the highway.

 

The 351C was designed for cars, not trucks. The 400 is an excellent truck engine.

 

Thanks for your guys' help. But another question (And if I should start a new thread for it instead of posting it here let me know and I will) The guy said the 400 was not the original engine and came out of a car or something like that. Was not too descriptive. If I keep the 400 will it be enough power for the truck? I know it had a 2 barrel intake on it, but I was planning on replacing that and putting a 4 barrel intake with Holley 650 on it. Good/Bad idea?

 

A 400 out of a car or a truck with a 2 barrel is plenty of power for the truck. It has good low end torque.

Engines that were available in a 79 F250:

300 I6 1 barrel
302 V8 2 barrel
351 V8 2 barrel
400 V8 2 barrel
460 V8 4 barrel

 

What do you plan to do with the truck? It's not going to make a good drag racer no matter what. the 400 with the 2 barrel carb will have about the same torque as having a 4 barrel. If you want hp, pull the engine and rebuild it with high top pistons to increase compression, hotter cam, manifold and 4 barrel carb. if I remember correctly the 400M has a long stroke (about 4")and should have good torque.

 

It’s for a first car. I figured that the 2 barrel wouldn’t be enough. I plan on putting the 650 on it because it’s just laying around. Unless this is a bad idea.

 

You have a TRUCK, not a CAR. Leave the 2 barrel on it. A 650 is too much at low rpm's. The long stroke 400 is not built for high rpm's.