[rbarrows]

I'm looking for some trouble shooting tips. My Shell Valley has a box stock 87-93 FI 302 that feels like it runs out of air under full throttle starting around 2500 RPM. It feels like someone clamps a hand over the intake or shuts off the gas momentarily. Since my troubles usually occur from the last thing I tinkered with - the only thing I've done is remove and reinstall the upper plenum in order to install new valve covers. I thought I might try a run without the K&N aircleaner attached but would welcome any suggestions from someone who may have had a similar problem.

Regards,
Robin