There are about a half dozen different sets of drawings out there, and all have their own failings, mostly due to folks guessing at what the actual dimensions were supposed to be, rather than having those drawings from original sources.
One of the values in the Campbell books is that the author has been heavily involved in researching actual Winchester drawings to get some of those mystery dimensions sorted. Most of the original factory stuff was chucked, but there was some stuff saved, though it mostly got piled in bins at random.
Anyways, if you contact the ASSRA Librarian, they can sell you a set of drawings for around $10US, while other copies on larger paper will cost more. There are many other sources, both online and in various book, too.
For the most part, if you cannot look at the cross sectional drawing and say to yourself that you can do it, having detailed dimensions isn't going to help all that much. There is a lot that has to be figured out, fitted, estimated, and just made to look right.
One of the values in the Campbell books is that the author has been heavily involved in researching actual Winchester drawings to get some of those mystery dimensions sorted. Most of the original factory stuff was chucked, but there was some stuff saved, though it mostly got piled in bins at random.
Anyways, if you contact the ASSRA Librarian, they can sell you a set of drawings for around $10US, while other copies on larger paper will cost more. There are many other sources, both online and in various book, too.
For the most part, if you cannot look at the cross sectional drawing and say to yourself that you can do it, having detailed dimensions isn't going to help all that much. There is a lot that has to be figured out, fitted, estimated, and just made to look right.