I believe that nearly all jeep size (read: 6-12000#'s) warn, ramsey, and superwinches share a common bolt pattern. Exceptions to that rule that I know of for sure would be ramsey and superwinch's worm drives. I can't help you with a closeup view of a YJ winch plate, or of any factory plate, but I just finished my winch mount, and I can share some thoughts with you. My winch mount was designed by myself and by a guy who built a tow truck for a local trucking company. First off, you'll have to attach it directly to the frame somehow...If you're custom building the thing, I'd tie the bumper and the winch into the frame. On mine, I made a heavy duty tube bumper...on the front are some nice big clevises for...uhh..pulling other vehicles out. On the back are two pieces of channel, 1/4"thick and sized to fit inside the front framerails. That goes back about 6" inside the front frame. On the outside, I used some heavy duty angle iron, cut to fit across the top and outside of the frame rail. That goes back just over a foot...Then, I bolted through the outer angle, through the frame, into the inner channel, both on the side, and on the top. (Incidentally, the steering box brace also bolts to the channel/angle iron on the right side) Because the bumper is so well attached, I made my winch mount in 2 pieces...the rear crossmember of the winch mount is a piece of 2x2 3/8" angle iron that attaches to the outside angle iron on either side...welded to it is a piece of 6" wide channel (needed for my application because of the worm drive winch I'm using) cut down so that the winch just clears the crossmember on the front of the jeep. The front of the winch mounts to a similarly cut down piece of channel, and then I made some angle irons that bolt to both the front and rear mounts to add stiffness. I bolted those on instead of welding because of one of CJDave's ideas from long ago. We want a really tough mount that can hold our winch, but we don't want to make any "captive" parts. I can remove the winch, the welded together outer crossmember/angle iron, the stiffeners between rear and front mounts, and the front bumper for access to ______(front suspension, steering, etc.) by unbolting, instead of by torching. Say, I just happened to think, here are some pics of a standard winch mount on a CJ...should be pretty similiar to a YJ...
Depending on what kind of winch you want, you can call the manufacturer and get the specs for the mounting holes...Like I said, though, I'm pretty sure that they are standardized. If you're thinking about a WARN and no one here can help (someone probably has one they can just measure for you) go to warn's website (http://www.warn.com
) and e-mail them the question.
Currently looking for corporate sponsors for jeep improvements...will sell advertising space on jeep, will also sell soul/body...make an offer.