We use used Nascar rods every once in a while... I have a set of Carillo's in my Turbo motor out of a Cup car. 6" X 2.10" X .927's Old stuff probably from late 90's. Dizuster has a set of 6" Olivers out of Arringtons for his 440" W9 motor....

As far as the wristpin end being too small on some of the newer stuff with .866" etc pins........ Current cup motors are making around 840 HP & turn 9200ish.... So I don't think most people are going to come close to matching that with their NA SB's....So I would'nt be too concerned.