I already posted a question about this but nobody seemed to have a clear answer. MY question is I took and 81 fast ratio steering box and put it on my 71 camaro the only problem is the couplers differ. THe original is big and the 81 is smaller because the input shaft is smaller. I got a response that year one had the right coupler. but i have the coupler of the 81 it is smaller and i dont see how it would fit on my 71 steering shaft. Also I dont see how it would come off there are no bolts like on my 71 just some kind of rivet. somebody said to use an adaptor off of a late 70 pickup but that doesn't seem right. If anybody has any ideas it would be very appreciated.