how big to bore out gm wheels

i got some escalade wheels im gona put on my d50 but i need to know how big the center hole needs to be. also dude at the machine shop told me $25 per wheel. does that sound about right?

25 per wheel is killer...and as for the size I suggest taking him a stock wheel so he can use a micrometer to measure it....that way it's totally accurate

if im not mistaken its just a shade over 4" but id do like aaron said and take a stock and get them to measure it with a set of calipers so that its a snuge fit other wise you will have alot of stress on the lug nuts

if there the same as a nissan, and we can use eskies

its 3.95

most nissan guys do 4inch even tho

i know that on nissan customs they had a thread about it, even a video shown how to do it... but the machine shop kinda sounds better...li 4 life