Edelbrock models 1405 versus 1406 carburetors

In regards to drilling out the idle jet, this was done with a hand chuck holding the venturi cluster steady while I drilled it at 0.8mm then 1mm. Took it for a drive and was all good so for good measure i gave it just a little more with a 1.1mm drill. All done by hand so you have control. Don,t use a drill. You will end up with excessive clearance. Closing the air bleed tends to fix the problem but you lose the emulsification of air to fuel which gives you nicer metering for idle.
Sorry I don't have any pics to show you.

Regards
Billy D...
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