carb suggestions

Thanks for the interesting feedback. Timing is set at 12 BTDC, i have removed the heavy spring from the dizzy, and it gives me 36 degrees at 2000 rpms. I put a trick kit in this carb several years ago, replacing the metering plate with a metering block and it worked great on a stock 360 as well as the stock 318. jetting is stock. i was thinking pump shot, but did not think i would need to re-jet because it is still a sub 300 hp engine. Is it better to change pump cams or try a bigger squirter?