I have a 4bt in my 90 yj for about 5000 miles .I made my mount out of the van and used 4in channell iron.First you have to drill bolt holes to fit the middle mounting holes on the motor then a 8in piece of channel straight out from the motorand another one the same for the frame side put the fluid mounts from the van in the middle remember to adjust for the compression of the mount so your motor hight will be correct
Pat