The "Oilite" bronze bushing listing for the 390 is the same 1.850" O.D. for the crankshaft fitment as are all of the light automotive intention FE's and the earlier (pre '72) 385 series engines, this being the difference to the S.B.F. dimension of 1.375" O.D., and the I.D. of .670" +/- is shared with all Ford "Top-Loader" 4spd. applications.
Scott.
It isn't the diameters I am concerned about, it is the thickness. I came across an adapter bushing I had in my box that adapted the big input transmission to a small block. It's extended about an inch.
Now I have an FE bellhouse off the car to measure the flange to flange but the small block bell is on the small block car so kind of hard to do lying on the floor to get the flange to flange dimension fairly accurately?
Now here's the thing, the input shaft is shorter on the 1-3/8" version v the 1-1/16.
The 390 takes the longer 1-1/16 input but the bell flange to flange it uses is the same flange to flange as the C60A bell isn't it?
Most likely the difference in the input shafts is compensated for in the bell house flange to flange dimension.
See my caution yet? I need the various bell houses here in front of me to verify so it's easier to question the pilot bushing application.
For a $10 item I'll go with the listings and verify as I'm assembling but I like to be prepared as possible. Not having the right part during assembly irks me something bad.