1988 Monte Carlo SS. will finish some day

[chumscustoms]

Got the monte running saturday. installed battery in the trunk. Utilized the original battery tray and relocated to the spare tire area in the trunk. Installed the shut off switch.
Welded in the 02 bung into the collector. Finished up some ground wires.
Had to remove the front runner system so I could install the heater hose from the water pump. Reinstalled the front runner and filled it up with coolant.
Had to install a plug that the previous owner of the motor had in finger tight. But other than that no leaks.
Fired it up. Seems like it may have a miss. But the open headers were a little loud to verify. But I also took temp readings off the header tunes and my d riverside is 250+ lower than the passengers side??