Quote:

* The LD 'in stock form' will not accept a spreadbore carb. It was however cast with intentionally thick bosses on the carb mounting surface, so it can be safely hogged out to accept a Thermoquad or other spreadbore carb.


And the difference in performance between the Airgap and the LD340 will so close as to say that if you already have an LD340 that the purchase of a new AIrgap would not be even close to a cost efficient move.