don't rule out a head gasket. i've had a head gasket burnt out between #3 & #4 knock loud and go away when retarted. Might try a compression test to see what you have without taking anything apart. good luck
I have a 28 fordor and moved the seat back. What I did was to take the seat apart and removed all the screws that holds the metal seat back. I then straighten the flange that goes on the front of the door post and attached it to the inside of the post. Then move the bottom of the seat,drill some...
I have a early 31 68B and I had to replaced mine. I think it uses the same pan as the coupe. I got mine at Bert's. If you give Steve a call, he will be able to fix you up with the right one.