I think you are out of time. Your timing tag should not be labeled -2,2,-4,4. each little line on your tag is 2*. typically the lines on the tag would be something like this... 12,10,8,6,4,2,0-2-4-6-8-10-12. The 0 should be TDC. you should put you #1 cyl on TDC and look at your tag, and that should be 0, from there, advance your timing to go towards passenger side. If you are now on the 6th line then that is 12* and you are too advanced, the manual calls for 8* so go down to the 4th line and that should be 8* BTDC then readjust the carb. OK, I FOUND A PICTURE OF THE 6CYL TIMING TAG. your 0 TDC is all the way to the right of your tag, looking at the picture it looks like they label them 1* at a time, so the larger lines will be in 2* increments, 12 10, 8, 6, 4, 2, 0.
....................... | ! | ! | ! | ! |! | ! |
I just started with 12 as a number, I think your tag go's up to 24*.
being at 12* may be why it won't start now also.