Hello everyone i am brand new to the site. I've owned my 87 sam for about a year and a half now. its a bus body. standard height but with a 1.6 tracker motor in it. I love the little thing. it came a good snow this past weekend and i probably ran 80 dollars worth of gas through it playing around! It was a blast though!!! but anyways moving on........ i am about to do a spoa lift on it. i am a machinist by trade and instead of buying a kit i'm making mine. i have the leaf hangers done. and i also have my pittman arm made. i need some help about the driveshaft spacers. i've noticed on alot of bolt on kits they come with either 3/4 or 1" long spacers. its just gonna be a 4 1/2" lift. which length would be the best. and does anyone know what the o.d. (outside diameter) of the spacers needs to be. and also what the bolt pattern is? i would really appreciate some help. I hope to have it lifted in the next 2 weeks. thanks in advance!