Cylinder has spark but not firing..

I was going to add this about 25 posts ago..

Are the intake manifold locator pins still in the block, .. they're in the middle, both front and back, to centre the manifold..

Does the manifold have the holes for the pins to go in...??

Seen a few manifolds with little dimples in the bottom.,, where people didn't remove the pins,,

They hold the manifold up, so it doesnt seal., sucks vacuum from the valley on the sides, and also leaks oil out the back like crazy..