Need Opinions. Have nothing to compare to.

I think the point is some lazy distributors are still advancing at 4000 rpm.
>As to the ported vacuum port, TEE into that line and watch what it does once you're in gear and driving. In N/P with no load on the engine you can see the relationship to vacuum vs ignition timing, but the relationship to rpm has no basis in reality until the car is in gear and driving.What it does in N/P is meaningless.
>As to power timing, It doesn't matter if the vacuum advance is hooked up or not because once the throttle goes to WOT-under-load, there is usually less manifold vacuum than can operate the can. If there isn't less vacuum than can operate the can, then there is something wrong; like a too small carb, or secondaries not opening, or a faulty Vcan,or a plugged/restricted exhaust. Even with the adjuster screw backed-off inside the Vcan, it usually requires a minimum of 4/5 inches vacuum to activate the can and get even 1 degree of timing out of it. So, then, you can see, it matters not under full-load-WOT, if or where it's hooked up to.
>Now why in the world the dyno operator would set the power timing to 45* all-in-including-the-can, is a mystery to me.Only he would know why.
Generally, power timing is set with the Vcan disconnected and the line plugged.After that the line can be re-installed,no big deal,IMO.Power timing on a low-compression BB, IDK much about, But I'm imagining it won't be much different than a SBM, so when I see 45*, I see REDFLAGS.
Ima thinking the power timing should be limited to 30/32*on the first pull, and increased in 2* steps, to a max of 36/maybe 38 tops. But 45*under load seems to me like hammer-out-the-bearings-and break-the skirts-timing.
>I'm still trying to figure out why you would state this combo with an A833, assuming it's in an A-body, is lazy,lol.
>Looking at the dyno-chart, she looks to have a nice fat midrange. If you converted that back to torque, I think it would actually look pretty healthy in that zone.You can do that using this formula, which is the same as the first but just rearranged to spit out torque.

Torque = hp x 5250 divide by rpm

>Pay attention to the previous posts; there is a wealth of information in them.