jerry - i had the same situation when i placed a 62 engine in my 54 and had to make the same changes that you mentioned. I also had to change the water pump to a short shaft style. I wanted to keep the foot starter so i had to keep the flywheel and the starter from the original 54 engine as well. the one from the 62 was a "key start" and the number of teeth on the flywheel were different. i think i used the 54 bell crank for the carb linkage but i still had to cut and bend it to get it to work properly.

54 3100 w/62 235 "Yosemite Sam"
Born a Jay Hawk, raised an Okie and resurrected in Texas!http://community.webshots.com/user/djed50