| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | You will have to inspect the MC, perhaps there is a casting number on it you can read? Otherwise have to pul the pushrod, remove the rubber bellows, measure the ID with calipers to get the correct size! Perhaps you have paperwork from the initial installation that would indicate MC size?
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| 
