Yep the bearing Andrew is talking about [spiggot] is in the rear crank centre where shaft slides into..
The 289 has slightly less stroke..
You should be able to find a reasonable 2nd hand gear box 4 speed from a Junk yard / wreckers..
Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..