[AussieinNC]

1/ Remove all spark plugs and perform a compression test on all cylinders...post results on here....

Cylinders are numbered 2,4,6,8 front to back on passenger side...

1,3,5,7 front to back on drivers side.

2/ Dont worry about timing yet....it may be that you should move the plug wires one terminal and reset timing to get vac canister away from manifold....

3/ Check the vac line porting you are using....image is attached....

BTW...that plug with closed up gap...no one checked it before fitting it....or dropped it !