B;
I looked for my notes on this, but no luck.
There's a timing gear set with 3 slots like Larry mentioned in an old Clifford Catalog. It has the same part number for the early/late engines which is; 92-3871.
This would indicate that they interchange.
The thing is that; 5,500-5,800 RPM is about 'max' for an early engine (no matter what) where the later ones go much higher (7,000+) which is what these gears/cams are for.
The center slot is probably what you'll end up with in the end. Spending the time/money on 'straping the mains' is a better choice as It's a proven practice.
The Esky E-2 or the Howard F 298 "rumpy" is the most you'll need cam wise.
Some head work will get you there faster and the straps will keep it together.
Good luck.
