LD340 v Airgap

raymond said
Thanks for the reply, my LD has the TQ mods plus when I got hold of it the WHOLE divider had been removed along with just about everything else in the plenum, it's not a pretty sight, I'm thinking the mods haven't helped it. Its in a 68 Dart has around 10.8 or 9 comp Eddies at mid 280's hyd / roller [email protected]" 1.6 rockers 999trans and 3.5 gear, It's gone 11.50 in really good air, it could probably use some more cam but I'm old and grumpy and more cam will drive me crazy. I'm thinking if there might be a bit in the AIRGAP for me I might grab one.

The mods helped it BUT you’re NOT taking advantage of it at all, not one bit. The RPM will be what you need with that tiny camshaft you have. No doubt!!!

As the MP book states, for cams with .600 lift or better. Now, take a trip through the history books (AKA The old catalogs) and see what MP has for cams in the .600 lift area. See what other manufacturers have for advertised and figures at .050 for duration.

What you have is a mild street performance cam that can use ether the Factory 4bbl., Edelbrock Performer, RPM/RPM-AG, Weiands Action Plus or the Stealth.

The cam I had a hen I used it, was more than 20*’s @.050 larger than yours and to be honest, it was still small for that intake with the mods. I should have used a cam with 20 more degrees of duration and a bit more lift.

Currently I have a 224@050 in a 360 working with a RPM-AG.
It’s a good match.

Oldmanmopar said
I liked the LD 340 better. I found this aluminum intake pictured and like it due to being able to use the factory carb and choke and has the coil mount. lso the same factory height

View attachment 1716035259

Ahhhhh, the standard MP dual plane. A copy of the early 340 intake. Surprisingly good!