Trial fit of fuel tank. Several failed attempts with the factory glare shield to firewall angle indicated the piece needed to be removed and an alternative made. Once the angle was removed the tank fit snugly between the firewall and rear glare shield stop. The vent cutout on the glare shield was cut back a bit more to eliminate the remaining interference with the vent fitting, filed and smoothed with Scotchbrite. Drilled out firewall angle rivets. Removed and primed glareshield with Optiflow epoxy primer.