[Excaliber]

When changing jets on an older Holley be careful to NOT tighten the float bowl screws to much. Generally in selecting different jets you have to tear down the carb bowls several times, to replace the jets yet again. The threads WILL weaken each time you do so and the screws eventually WILL fail, thus your left with a damaged perhaps fatal problem for the carb.

I ALWAYS use new float bowl gaskets and tighten 'just enough' to HOPE it won't leak. If it DOES leak I am forced to tighten down the bowl screws 'just a little more' to stop it (which can be done on the car).

If the screw holes DO 'strip out' you can 'heli coil' them but I would recommend it be done by a competent machine shop as it is really a bear to get the new heli coils properly placed.

Been there, with a NUMBER of old Holleys!