Hey all, thankks for the responses!

Not using the mixture screws to set speed, rather as you suggested part #12. initial balance done with linkage removed, and that seems fine. Didnt disconnect dashpot tho, will recheck with that off.

Fuel delivery system has been checked and is in good order.

Didn't eliminate vacuum leaks, just never found any by spraying wd40 around. not ruling out that possibility, but cant confirm it either. No power door locks/windows.

Will do further recon into heat risers.

Thanks!

Marc