It’s the 2” K&N and I put in Schumacher stock replacement motor mounts. I’m not using any carb riser plates.
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That's why I asked about your mounts, I suspect the Schumachers may be your culprit?, others have complained about them in the past when used on fresh air cars raising the motor higher causing seal/air cleaner interference problems, and the 68-70 B body stock hoods/braces/pads are VERY close when running an RB sixpack
