If I remember correctly I had no problem bending a couple inexpensive 14mm wrenches to use as "special valve adjusting tools". Its been a long while since I've used mapp gas. I just finished twisting and bending a 1/4" flat bar stock to make a new exhaust pipe support for the 300dt - 5spd project car, I did have to use the mapp gas torch head (on regular propane, though) just my .02 good luck, mark