Here's mine & we're pretty close . 318/2wd/3.23 (3.21?) sure grip. 10-12 MPG, starts/runs good. Bad: gas gauge non op/rad leak/oil leaks. You have a timing (total/curve) issue but that ain't what is causing the hesitation. #1 check AP squirt/duration, should be immediate on tip in. Nor is the carb lean but you might have a vac leak. Check into the std tune up items incl rotor phasing. You wouldn't happen to have a wiring diagram would you , i wanna get after that gas gage prob.