I'm thinking you might need to re-adjust the pushrod after you're sure all the air is out of the system. I made the mistake on my '62 of over-adjusting the pushrod on my M/C,and had to re-adjust it a little at a time until I had everything where I liked it.
Speed

1954 GMC 350
1957 GMC 1/2 ton
1962 Chevy C-30
1952 Chevy 6400 dump bed project truck
'98 Harley FLSTC
'66 Pontiac Catalina
'76 Chevy 1 ton Duallie
'84 Bronco II
'78 Dodge W-200
'81 Toyota 4X4 truck