Widening stock wheels

I made a set of 12inch stock looking wheel I went to a speed shop that sells stock car parts ordered a set of there 12inch.wheels and told them not to weld the centers in them.then took the center out of a stock wheel and welded it in.looked good with dogdish caps..thess wheel are a little heavyer than a stock wheel.and wen you put the center in be very carefull measure & measure then measure and then measure again tack weld and then measure again.the first set I made got sold before I was dun for 400.00 bucks hell the wheels only cost 50.00 each.dont know what they cost now...just a suggestion..........Artie