zed1015 wrote:cakeman wrote:I assume I can use either a Unitrak head or a B2 head ? Are there any other's that are compatible?
No. Unitrack head has different (steeper) exhaust valve angles to the B2 and all the others.
If you have a unitrack bottom end (18mm gudgeon pins) you need to use the Uni head unless you want to get into modifying the exhaust valve pockets on the pistons.
Great info, cheers for that. It looks like I'm after a B2 head then as the bottom end is B1 (according to the engine numbers) as the castings above the inlets are not present. Are there any other heads that are compatible with a B1 engine and barrels?