68' 400 auto convert. with a/c.and p/b. i haven't had it long, and i'm not at the knowledge level of some here. but i want more power/torqe. all stock parts on motor, other than carb.(1901 edelbrock) in 2nd. gear at 2000 rpm, when given full throtle. it doesn't bog, but it doesn't jump either as the rpm build i can hear the secoundaries come in at about 3500rpm. i have ajusted the spring tension for the secoundaries to the point they almost fall open. if i tighten it, the secoundaries come in even higher in the rpm range. per the 1/4 turns i put in them.
in checking all tune spec. all the timing is in by 2600 rpm, it has a B1 vac. advance it's close to orig.spec., 9* btdc (no vac ), vac. at intake at 900rpm is 19inch. (seems high). copression average is 186 psi. i run 4 gal. of 112 to 10 gals of 93 for an octane level of about 98. i have spark knock on any thing 95 and under.
could the lack of power, spark knock(dinamic compression), and high vac. be due to a tight lobe center and small cam. it has a every good and calm ideal i can turn it down to about 500 rpm with no problem, it just tends to die when put in gear. my rear is the posi 2.96 , 68' #16 heads.( cam and deck highth, i don't know)
is it just what it is or is something missing. plans are a crowler 60916 cam, long branches, a cliff carb.,shift kit, and later a lower gear rear end. thank for input. lost