Auto ca18et backfiring, no power... help!

[bigdaves12]

Si took the distributor cap off and compare it to my cap from my old et and its off by miles:



stuck my old cap on and timed it up at 15 degrees and it fires up nice, replaced the maf too and now to take it for a test drive. Only thing is my uncle blocked the entrance of the garage and i have to wait for him to get back

edit: before i couldn't advance the timing, now it seems ok