Quarterbore,
When you said you had to file the top rails down, can you explain this?
-- OK, i understand this now it pulls them together. but what is the proper ID down the center of the receiver by the support. Is it the same as the trunion width?
When at first you went too far and the go gage would not fit. How do you 'fix' a headspace by using a larger pin? would be a bitch to drill down the center of the new overlapping hole.
If the stock pin fit, was it perfectly aligned?
thanks for all the great tutorials and a great site.
Jeff