I finally got a 390 peep it..

 

I can't believe I finally got my hands on a 390 and it looks like it was rebuilt once, took me long enough. HAHA!

 

 

Wow, a rubber "freeze" plug on each side. That engine was running on borrowed time in it's last home.......
Those rubber plugs are best left for an emergency roadside repair, just to you home.

 

I ran rubber plugs on a Yblock for ten years without a problem but that was using water, maybe anti freeze/coolant has a different effect.

 

If you ever had one just fall out, dumping all coolant, and not know it happened (like at night!), therefore kept on going, until the engine was toast, you wouldn't trust one any further than *absolutely* required.

 

You say that the 390 was rebuilt; I think, and I maybe wrong, but that block looks like a 360. In the past dealing with the Ford FE engines; the blocks that I have had with the "ribs" on the side of the block were 360 and none of the other FE's that I have had had them.

 

360 and 390 used the same block & heads, the difference was the crank/rods/pistons.
Either way, the 360 didn't exist in 64, which is when the C4 casting number was first used.

 

With ribs on the block and dished low compression pistons I'm guessing this is a 391 truck motor..

 

Perhaps in part, but the crank snout doesn't appear to be from a 361/391, and I don't see the tapped hole for the oil drain from the air compressor.

 

you are right,the C4AE-B should be a 390 crank but the only blocks I recall with ribs were the HD trucks but without the block casting numbers it's hard to tell, so maybe it's a hybrid someone but together

 

From what I understand service blocks had no casting numbers and the ribs on the side of the block was to help with the casting proses.

 

Take a wire wheel to the piston tops, if they're oversize,. the over bore will be stamped into the piston top. As for the block/crank combo, at this point in time anything's possible 40 years after production ceased. The cam thrust plate is also on backwards.

 

guaranteed not a 361 or 391 and you beat me to the punch on the cam thrust plate it was one of the first things i noticed too so reps to you baddad

 

Notice it has a stud on one main cap for a rear sump pump. As far as I know all the cars up to 64 were front and they didn't have FE's in F100-250 in 64.