starter, solenoid, battery cables, start switch. plus other odds and ends. new flywheel. the cost will probably dictate, selling what you have and replacing with an electric start motor.
"Other odds and ends" would include the bracket for mounting the starter motor. Not an easy item to find. I found one a couple of weeks ago, the guy wanted $40 bucks for the whole parts (junk) motor. I came within an ace of buying it just to get the bracket. It seems like there are more people looking for starter brackets than there ever were brackets made in the first place.
It's hard to find the mounting brackets for that year of motor. There is a place I know which sells used parts and I was told just the bracket alone would cost $90.00. The total cost would be around $250. for the bracket and starter.
The place I work out has one that would fit, and he wants $250.00 for it but it is installed and with the switch and soloied.