Replacing a fuel pickup unit without cutting metal or removing the fuel tank can be tricky, but it's not impossible. Here are a few suggestions:
Check for Access Panels: Sometimes, there are access panels or removable sections in the floor or under the rear seat that can provide better access...
Great job on the conversion! For your setup with the PerTronix distributor, it's generally recommended to connect the vacuum advance to the manifold vacuum. This provides a stronger vacuum signal, which is better suited for the PerTronix distributor and helps improve drivability and fuel...