I just installed the xtra-10 on a '94 Indy Trail and used JB's measurements. On the link on top the front mount says 4 1/4 inches and JB says 133mm = 5 1/4 in. from the top. Is there a differance in the '94 tunnel? Just want to get it right before the snow. P.S great info on your site JB and I will be calling you to get some shocks rebuilt.