Hi folks
Vehicle is a 56 f100, front motor mount. Motor is 331 Y-block courtesy team Mummert. I have had it running on a test bed, sounded beautiful.
Lifted it into the truck and bolted it to the bell housing. (c4 conversion)  and found I had the wrong front motor mount. It did not reach the front cross member.
Got the correct one and bolted every thing up. Feeling very happy I started on a twin exhaust and kind of left the motor for a while. Two or three weeks ago
I decided to turn the motor over after it had stood for a month or more. It was stuck fast.
Must be something in the bell housing. I slacked off the bell housing bolts and the torque converter nuts . Still stuck.  Pistons frozen in the bores?
For three weeks I've administered ATF/acetone and bumped it with the starter. First I would be lucky if it moved a degree or two later I nearly got one revolution.
This morning I was watching the damper and I thought that's a bit shiny . The damper is rubbing the motor mount! Slacked the bolt and the motor whizzed over on the starter.
So do I put a shim between crank and the damper or maybe spot face the timing cover to move the motor mount closer to the motor.
Advice  or feel free to chuckle please.
stuey