Info needed: M38A1 Master Cylinder Replacement?

[Les Kovacs]

Hello to all.....I have a 67' M38A1 that requires a master cylinder replacement.

Not sure how it can be done but .....how do you take out the long bolt 3.5 inch bolt to rear of the master cylinder closest to the pushrod....screw it out an inch and it hits an engine bolt frame with at least another 2.5 inches of bolt to go?
Do any other parts have to come off....maybe pull out engine?

Also.....OR.....can I just replace the push rod and associated hardware from a rebuild kit without taking off the actual cylinder? If so, can I take a piece of fine sandpaper and sand the rust off of the (inside) master cylinder where the pushrod goes into the cylinder.

Please help,

lesk