Dick, could I email you a picture of the stabilizer, I haven't bought it yet but the seller was kind enough to send a picture & perhaps you could offer an opinion based on what you see as to whether it will fit. I tried to PM you but too many Dicks. Thanks, BobBob,
I checked on my '35 & '36 frames and the mounting holes are not present. I have two of these bars and they have different mounts; i.e. one has holes to fit around rivets in the frame and one has a slot. Could be one is '41, the other '40. I have a '40 frame too. The rivit in question is the front rivit on the front cross member. IMO it would work, but I can't say this from experience. I'd be willing to take some pictures or measurements so let me know if I can be of further Help. Dick