Stock Stroke 340 Build with NC Engine Builder

The heads I brought are a lightly used pair of standard port ProMaxx 171 that I picked up off the FABO classifieds from someone that went to TF heads. Shawn started playing with the heads early on so we would know what to tell the cam grinder an get an idea of how far we could go. He flowed an intake port and got 246 @.550 which is about 5 cfm less than advertised by PM. He said he would clean them up to see what they would do, but try not to go crazy. Some quick chamber work and knocking a few barnacles off in the port resulted in 268@.550. No tubing, or other significant work. Commented that he SSR was pretty nice and valve job not bad. He went back later and spent a little more time on the chamber area mainly and the result is as follows on the intake side.