I have a 1970 Z-28 with a stock 350 LT1 motor. Only upgrades are headers and new exhaust. I recently purchased an MSD Street Fire 8362 HEI distributor. To install it, I got the engine at TDC by removing the plug from cylinder # 1 and placing my finger in the hole. Then, turned the balancer until compressed pushed my finger out of the hole. Then, I turned the balancer until the timing mark aligned with TDC “0”. Then, I removed the distributor cap and made sure that the rotor was pointing to the post that’s connected to cylinder # 1’s spark plug wire. I then attempted to start the engine and it starts but then stalls. I checked all of the wire connections and they are fine. I advanced and retarded the distributer slightly but same results. In the past, when I've done it this way the motor fired right up for initial timing. I'm baffled as to why it's stalling. Any help would be greatly appreciated. Thanks !