I think I ordered the wrong flywheel from JEGs. Ford Performance M-6375-A302B: Flywheel Pre-1981 302/351W | JEGS This is the flywheel I bought and it uses metric bolts and the 289 requires 7/16. Am I okay drilling the flywheel out?
I am just about done with my C4 to T5 in my 66 and I bought everything from MDL and fit up perfect down to the last bolt. Cost more, probably yes, but everything is new and easy. I did use the Mustang Steve clutch cable but it all fit great as well. I think most of the fitment issues are by piecing it together. Nothing wrong with that approach just more to figure out.
Mine was easy.
I could have wrote this post, this was my exact experience with the swap. Very easy.Mine was easy.
I used the original bellhousing which required the Modern Driveline adapter plate.
I couldn't find my original transmission crossmember, so I bought one from Modern Driveline.
A slight modification on one of the passenger side trans mount tabs, and the mount was in.
A new driveshaft, and original clutch linkage went in with no problems.
I originally used a polyurethane transmission mount, but the noise and vibration was noticeable.
I switched to the original rubber mount, and it's smooth and quiet. now.
It's not a tough swap by any means, however I did make a mistake with the speedometer gear, which I fixed by double-checking my math and ordering the correct gear.
I believe the general consensus is that it's hit or miss, but it seems like it SHOULD work with a 10.5" clutch. Only way to tell would be to try and bolt it up.I got the flywheel on. One problem out of the way. Now another....e3zr-6394-aa is the bellhousing I bought. It was made for a 83-85 gt and a 10” clutch. E6zr-6394-aa is supposedly the correct one I need. It was made for a 10.5“ clutch. I’ve read conflicting information. Some people say there’s no difference in size, some say there is. I’d like to try the different bell first before I purchase but I’m stuck for now. Any thoughts?
I’m SOL then. It hits the flywheel. I’ve also read that the 1983 flywheels where smaller to accommodate the smaller clutch. Must be true. I thought about grinding the heck out of it but that’s probably not A smart idea haha. Maybe the early bells were made in a different foundry and were smaller? If anyone has an extra bell I’ll buy it!I believe the general consensus is that it's hit or miss, but it seems like it SHOULD work with a 10.5" clutch. Only way to tell would be to try and bolt it up.