After sitting that long, the possibility exists that you have a ring problem on one or more pistons.  I may be fine, but worth checking if the fuel is rulled out.

this gets confusing so stay with me. in a 350 and other v-8's, 4 cyl, v6, etc, each cylinder has a matching cylinder, all have matching cylinders. If you had a 350 on an engine stand with no heads on it and had number 1 cyl at tdc (top dead center) you will notice that there is always another cylinder at tdc, and  had on a 350 that cylinder is #6. I don't know why, but trust me on this, Ive built a lot of 350's, when you match the marks dot to dot, you think its on #1 cylinder, but its NOT, ITS ON TDC #6. I just built a 350 for my van, after cam install, I turned the crank 360% (one full turn and the cam turns a half a turn) and now the cam is positioned at tdc, now you stab the distributor.  if you stab the distributor when its dot to dot and point the rotor to #1, you are really supposed to point it to #6 that is were most people go to start it and the distributor is 180 degrees off and the wonder (including myself) "how is that, it was dot to dot"

I have never done the 12/6 oclock step but it would still work, it is just easier to make sure the marks are correct doing it dot to dot than 12 and 6.

here are matching cylinders 1 and 6, 8 and 5, 4 and 7, 3 and 2, hence 18436572.

 

I never go over 30 degrees total advance, if your doing  36 degrees just to get it to run, you have problems. anymore than 30 especially with high compression engines your going to start losing valves and pistons.