4160 metering plate needed

i like it. it let me dial in my holley 390 on my slant six. and i think it was cheaper in the long run than buying plates. i think it was around 40 bucks for the kit at a local speed shop here. and i thought plates were about 20 bucks, or maybe 24. that can get expensive if you have to buy a few plates. good luck with your]tuning.