Whats better timing?

Your combo is much like mine,except Im runnng Eddies,10.7 cr. and .034quench
I highly recommend putting less initial into it. 18/36 sounds about right. If you are unfamiliar with the sound of detonation, I would sneak up on the fullpower timing though, starting with a little less max; perhaps 34*. On the street, in an A-body, a couple degrees less than optimum,I havent been able to notice.Mine works very well with as low as 14* idle timing.I have been running about 14/34 for many years.
I also run vacuum advance, of 20 to 22*, bringing it in as fast as possible. I preach streeters need vacuum advance. Guys without it IMO are missing out.
Dont be afraid to run less than the published power timing numbers.Sneak up on the numbers. On the street you wont feel 2*, until its 2* too much. Even then you could miss it if youre not paying attention.
Locked-timing is for race cars, or maybe cars with really BIG cams.Your cam, like mine, is just right. Certainly not BIG. Dont be in a hurry to swap it out. You wil lose bottom end torque way faster than gain useable power.Streeters are way more fun with a strong bottom end.