Anybody go from performer to an rpm air gap

Mattax said
Steve - Thank you for the tip. I've put the gasket on the head and then on the intake assuming that the bolt holes would line it up. Well next time there will be scribe marks!

Dave - Yes. The LD340 has a notch in the plenum divider. And in the Direct Conection tips for drag racing, they had best results removing most of the divider and then depending on the carb, notching the carb's boosters. It doesn't say so in the reprint, but my assumption is this was for stock or super stock classes and because 3500-7000 rpm was the primary focus!

The notch between the sides on the LD340 was to allow use of the old Holley 3 barrel carbs that they were pushing as the latest greatest thing back then.(showing my age now) Of course most of you guys never heard of a 3 barrel and will probably never see one. A lot of mags back in the 70's urged people to cut the wall out between the 2 sides of the LD340 and it added a few rpm up top and killed off some of the low end torque. I wouldn't recommend it. They ended up coming out with better designs. The Performer RPM(whether airgap version or not) will outperform the standard performer pretty easily.