So during a typical start up, the car had a major backfire. It was so loud that my ears were ringing for about 20 minutes after the backfire. Since it was so loud, and I was in my garage with the door open I assume that it was from the intake, as if it was from the exhaust it would not have been so loud.

I plan to check the spark plugs, compression, and distributor (to make sure it is not lose)... is there anything else I should check to make sure nothing was damaged and ensure this does not happen again? Are there any typical culprits of an intake backfire from 455s?

Thanks!