Window regulator

[1937pickup]

I need to replace the window regulator on my 37 pickup. I found a re-pop at C&G Ford Parts. Does anyone have any experience with this particular regulator or other re-pop regulators from C&G. I also need a glass channel and I think they say you need to do some "slight" modification of the replacement channel. Any one know what needs to be done?
In the past I have found C&G to be a good supplier.
Thanks.