331 stroker with spark knock

I wouldn't beat on it much until you get it tuned. A good tune will more then likely clear up most of your problems.

Are you running 92 octane? If not then youtun should be. What is your base timing? Your probably getting to much total timing to fast. Your tuner can fix that easy with a chip. For right now run 10-12 degrees base timing with the bung pulled. If its still pinging take more timing out. I dont think your pegging your mass air but its a possibility.

With a stroker motor thats making good power you could be pegging the maf. It says you have a 73mm maf which really isent that big. I mean pegging by the maf voltage is as high as it can go. Meaning you need a bigger maf. It works on a 5 volt reference, and voltage goes up the more air that passes by the sensor. If you get close to 5 volts then anything rpm above that the car cant adjust for the right fuel tables. Again your tuner can tap into the return wire on the maf and tell you if it to small or not. Whats your fuel pressure at vacume off? Do you know your total timing?

Get a quarterhorse!

How do you plan to tune the car? By what means are you going to tune the ECU? Unless you have a chip of some sort(Old technology) what is there really besides the base Idle to change? You may have an adjustable FPR or what have you.

If you want to actually see what your car is doing......get a quarterhorse. For less than 2 hours on the dyno and a chip you can have permanent datalogging capabilities. Every time you change or upgrade something you will need dyno time to fix your tune otherwise. The software for it is here. The site that the guys hang out at is eectuning.org. Then you can make changes yourself whenever you want. Plus it is seriously cool technology.

Really though it is a worthwhile investment.