i just finished my 88 t-5 swap into my 46 1/2 ton and i used an adapter from bendtsens and didnt have to cut anything, the only drilling you have to do is drill out the holes to 1/2 on the trans because they are metric,(case is aluminum, so it will drill easily) and the bolts are standard thread, dont forget that you have to change the clutch disc to match the spline on the T-5 and also if using the the original shifter like i did, you need to straighten it,(i stuck mine in a press and straightened it no problem), P.S. if you go to transmissionadapters.com they will even set you up with the right clutch disc for you're trans,thats what I did and everything slid right together with no problems,if you have any questions, i might be able to help you
