New to 340 so I have questions

I cant get it below 950 according to the tac,
sure you can, just need to know how, And it will sound so awsome.
I know it can be made to idle at less than 650, in gear, and rolling down the road. I know because mine does/did it;
at 500 with the previous cam (270/276/110/51* overlap), and
at 550 with the current cam, (276/286/110/61* overlap), and
at one time, she ran the....... (292/292/108/76* overlap), cam, which idled almost that low, still pulling itself with confidence.
All cams spec'd at advertised of .008 tappet rise.

Making it take throttle from 500/550 takes a lil finessing, which is why I leave mine set at 550 when parading, 650/700 normally (in gear and idling). However, my engine is a hi-compression 360, and has a manual trans, with 3.55 gears, and a big fat factory flywheel.
> To do both instantaneously, (550 parading and say 750 normal in Neutral), you will need to be able to retard the timing electronically, from the front seat, with a timing-retard box.... mine is adjustable with a knob, within a range of 15 degrees.
Yeah, nice car! you have there