easiest method for intstalling notches?

i got a set of bolt in suicide doors c-notches for my noma cause i'm tired of the axle slappin the frame. This will give me a little more to play with until i get bags or whatever. I'm glad they gave me a template, just wonder what is the best way to go about this? I know its best to support the frame front and back so it stays level while i cut it out. I don't have access to a plasma cutter but i am pretty good with an oxy/acetalene torch. Would this be the best way to go about it and then smooth it out with the grinder?

oops noticed you said BOLT in.

Use 4 jacksatnds behind the axle and two in front, and support the rear end so the weight doesnt affect it. Pull the bed too.

i helped on of my buddies put a bolt on notch on his blazer, and we cut it out with just a cut off wheel, and then we didnt bolt it on, we welded it on and then did filler welds where the bolt went. but yes do make sure that u have support ESP on the front of the frame, thats where most of the weight of the truck is. hope that helped some.

wouldnt trust the bolt in style id weld it