hey marc, I have a question for you. I went out today for some testing and kept on woundering why I kept hitting 4500 and it wouldn't budge anymore. I pull up to the shore and check the carb. I disconnected the cable and pulled the cable bracket on the carb, and it's maxxed out, not allowing it to go anymore. The carb is a 4150 double pumper 750 cfm Holley. It hasn't been rebuilt in the three years that I've had it, so I'm thinking I either need to or get a better carb. I have a pretty much stock 454 with a 282 crane cam and flat top pistons.
What adjustments do I need to do to open it up more. Thx