That’s a strong comparison and real world evidence, thanks for posting. To me that combo is light of where it should be with that compression and camshaft but more info on the heads would tell the tale. I definitely think something is holding that back.
Did you dyno it with any of the other intakes? What is it about the combo with the LD340 that you happiest with?
The heads have only had a valve job and the bowls cleaned up. I believe the camshaft is a little small, it was ground for a 3.31” stroke but I ended up finding a great deal on a 3.58” stroke crank and some .060” 360 pistons so it is now 371 CID.
I feel the car runs pretty good, pump gas, all steel, full interior and runs mid 11’s with a 4 speed at 118 MPH. I also feel the dyno numbers are pretty good for a motor that was designed in the 1960’s as there were several late model 392 challengers and 5.0 mustangs that were putting out low 400’s on the dyno which seems to line up with what others are reporting.
I have only had the LD340 on the dyno. I have run both the Victor 340 and M1 on the track with the M1 being a little over a tenth faster. On the street, the performer RPM was great off of idle but the LD340 pulls harder up top and the power doesn’t nose over like it did with the RPM.