[chief tool]

1. You don't need an account, just do it. Really? In which case i will...its a bit of work though, i'll have to make sure that I can fully back up my info first.
2. Disagree about the FS series. I've seen the bell pattern, and as fraud says, it appears to be the same as F but with two bolts less or some trivial detail. Are you sure? I havent pulled one apart myself and measured the bits, but it does have alot in common with the B series...Such as water pump style and location, crank pin and main journal diameters on the crank. to me the 83mm bore is a dead giveaway, same as the BP. all F series engines except the F6 use an 86mm bore. The F6 used an 81mm bore but on the same cylinder spacing as the others.
   
3. Fair enough :-)
4. Can't say I give a toss about any engine that doesn't have a bucket style head :-) Either do I now....but back then.....

Cool, comments in italics