detonation / knock issue on 340

RustyRatRod said
I do not mean this insulting in any way shape form or fashion, so please take it in the intent it is given. If you do not have good and I mean GOOD carburetor tuning skills, don't get a thermoquad. They are great carburetors, but the learning curve is pretty steep if they are new to you. Also, if you run a square bore carburetor on that intake, you will need the thin plate from Edelbrock to assure you have no vacuum leak around the secondaries. This is all you need. Most O'Reilly stores stock it.

Edelbrock 2732 Edelbrock Carburetor Adapters | Summit Racing

I don’t get offended, I am asking for help and appreciate the advice. I had a ton of Experience way back in the late 80’s early 90’s with thermoquads ( I used to call them thermo bogs ) but damn when those secondary’s kick in. It’s just been a while. I have zero experience with holleys but have learned a lot over the last few weeks. Just really want something that will be an easy use. Not looking to run 1/4 mile times or get every horse out of the motor.