Ford 6 Cylinder

Can a straight 6 engine from a 1968 Ford Custom fit in a 1967 Ford Mustang and fit a C4 transmission?

Can the Custom engine fit into the Mustang with no modifications and still fit the transmission?

Public Comments

1. maybe, it's a 240 big block and has the same bell housing as the 302, but it's longer than the 200/250 sixs, so there maybe some modifications to the fan and radiator. also you will need to adapt the original six motor mounts to the Mustang frame. this is not a engine that was offered in the Mustang line so it will take some doing. While you are at it, think seriously about using the 300 inch crank! : ) think CLIFFORD
2. I think it can. You will always have some modifications. New motor mounts for example.
3. Not the large 300 cubic inch (boat dock anchor) in a mustang way to heavy and a little to long. Torque from that 6 should be hooked to a C-6 that might not fit the tunnel of the car.
4. as long as the cubic inches are the same it should fit!!! i put a v8 engine into my 1974 pinto and its a BEAST...I'm an ASE certified master tech.
5. In short, it's not a direct replacement for the six that came in the 'stang so it will not fit the motor mounts or transmission. Stick with the 190/200/250 cid family and save yourself some headaches.
6. Oh baby!!! You are dealing with stuff from back in the day! I envy you. Back then there were small blocks and big blocks! If a motor were a small block it would only fit a small block bellhousing and vice versa. So yes if the motor is a small block and I am sure it is it will fit. You may need to make a few modifications but they are minor. Exhaust etc... This is from the day when a starter would fit practically all ford made. Maybe three starters? All had either a two bolt design or three bolt. If you needed a three bolt you merely pulled the two off and put a three bolt end on it! I had a 1981 F100 stepside that had a 300 ci six banger in it. When it died after a second overhaul I found a 67 or 68 289 ci and put in it. All I did to it was changed the little box that was either for a four or six or eight cylinder controller from the six to an eight. I then pulled a distributor from an eighties model 8 cylinder and put in the old 289. then I took a set of motor mount brackets from a junkyard truck and bolted to the back of the cross member and then a little sweat and it was running sweet as honey! Later after I killed the transmission (manual 3 with overdrive) because it could not handle the extra torque I put a c-4 in it. I killed it too and then put in a c-6. Life was good for a while... Old lead foot me I had to rebuild it again and then put in a 351 cleveland... That was a little harder but still doable. Life was good for a mechanic in those days. The Fords were engineered right and proper back then. Now there are probably over 300 starters made for ford vehicles on the road today. Why is a good question. Sorry to ramble so but your living life right... Take your time and have some fun!
7. It sure would but it wouldn't be my engine of choice.
8. Don't wast your time. The 6 out of the Custom or Galaxie body car is to big for the Mustang engine bay. The big 6 from the Custom has a higher deck than the original 6 used in Mustangs and Falcons. The Custom motor you are dealing with is used in the Ford truck line and tractor line not the Mustang line. Your Mustang 6 is the same 6 used in the 1980's Ford Fairmonts & Mercury Zephers, I had one. Might be the route to go with a newer engine. My advice is get a small block V8 289 or 302 and a V8 conversion kit from a Mustang dealer.
9. the 300 crank wont work--different engine line. the 240 and 300 were light and med trucks only. the car engine will fit the mustang with not many problems at all. Very do-able.