[Rickd]

Doug. I was researching heads, just like you. I have a Unique Motorcars 289 FIA with a 302. I was told by the Unique factory that I would have to modify the exhaust or the headers in order to instally the AFR's, and they recommended I go with either Trick Flow or Edelbrock heads.

It turns out they were partially correct. If you try to install the larger (I believe they are 205's) AFR's you need to modify the header or exhaust, however the 165's are 100% just "bolt em on". I found out too late or I was ordering the AFR's. I ordered a set of Trick Flow Twisted Wedge heads from Panhandle Performance. They buy the casting, use better valves than the stock ones (Ferrea Racing Valves), install the proper springs for my roller cam (an upgrade on both Trick Flow and AFR heads), and do some bowl polishing, and they provide a flow chart (they call this their Stage I head).

The Trick Flows I have are beautiful, and they flow very well at all points of lift up to .500, which is my max cam lift. You can definitely install the AFR 165's, and if you are doing a new build, there will be no problem.

My TF's flow .10 lift 64 / 54 (intake / exhaust): .20 lift 141 / 109; .30 lift 195 / 147; .40 lift 238 / 174; and .50 lift 254 / 193. Can't wait to get them installed! Have fun!! Rick