Originally Posted By Blakcharger440
Originally Posted By rickseeman
It will have to be a siamese block. You need the 4.500 bore. Order one from Jegs P5160150AC and wait. Hopefully it will eventually get there.


Do you know if the siamese blocks have problems with cooling when driven on the street or fairly long trips?


You won't have a cooling problem. The siamese blocks have been around for a long time.

2011 Drag Pak Challenger