Good Info Dave .Thanks
Ok back out yet again to have another look at this issue.
After measuring the Flange which is 1" and the cases ,comparing figures to my VHA case..all seems good, so why the 2mm protrusion.
I had a look at the rod,first.A7/S24.Yes the 5 looks like an S..lol.look up in the book and the VB uses A7/524.I then yank off the case and yes indeed it is a VB Crank,30mm Vs 28 for the VH..also A7/550 is stamped on the flywheel.
Now I know why the 2mm difference.
looks like I'm making an aluminum 2mm spacer and maybe longer push rods.