citizensoldier

Ok guys here is the deal. I have put a new intake and exhaust manifold, new carburator, new distributor with electric ignition, re-built fuel pump, new exhaust, new plugs, new wiring harness, and new others.
I have been trying to get it started and found out I had no spark. I then replaced the coil and now have good spark.
It started up and ran for about 40 seconds and then stalled. I have tapped the new carb a few times too. At first I thought I was not getting fuel. WRONG I pulled the fuel line and the pump is pumping??? I tryed a bit of starting fluid and nothing. Checked spark again and got good spark??
Any suggestions? This motor ran good before all this it just had a cracked exhaust manifold.. Its got me baffled. I have re checked the distributor timing to make sure I had it at top dead center of #1 and it is right. Also it started and ran and when it ran it sounded good...
HELP!~

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54' M37CDN,56' R2 "Argyle", 52' M42 project, WC51,M51A2,M52A2,M816,M35 Curtiss Wright gasser,M35A2 "Sandbox Slayer", M35A2 tank truck,M109A2,M1009,M56B1,M818,M135,WC52,M35A2x8,M8 87x3,MKT-90, MKT-89,M1009,and to many trailers to list.