Thanks for talking with me Bill, Your right after pulling the engine out under my bench it does have a very faint W after the G so it does read
GW340P33980351 X maltise cross and then a A4 under it just like in Scotts pic, i measured all the bores with a telesopic gauge and then measured it with my calipers and they all look standard at 4.04 definatly not .020 or bigger on the bores could be .005 as using calipers not as acurate. here are some pic's don't think the closeup will show with my camera. Thanks Mike
P.S. So mistery is why 11/16/70 assy in a 4/2/71 Demon 340 still continues?