this is a quote from Manton Pushrods.

"Do not allow over clearancing for the pushrod. This may cause the pushrod to move around or deflect more than needed. Clearance of .010 at the closest point, wherever that may be during its complete cycle is sufficient. The cylinder head and engine block can often be utilized like a big guide plate and dampening device, which stabilizes the pushrod. Just make sure that there is no interference problems when turning the engine over on the engine stand."


http://www.mantonpushrods.com/Pushrod-Info.html


Joe

Thanks joe Manton is who is making the rods
Gary