Need help NON mopar 1967 Pontiac Lemans 326

Is there a port in the floor of that intake that needs plugged? Take vacuum hose off at dist and plug it. Pull timing up to 30 or so. That happens then. If no better, pull the plugs and see if they all are burning nice or are 4 gold and 4 like new looking from not firing at all. Does the camshaft have a different firing order than the stock cam. Kim