340 parts interchange & performance Q

I have to ask the same question... Why so mild on the cam and intake?? Also, why use Edelbrock Cam and lifters?? Much better choices are out there for about the same money. I know that, NOW, you already have the Edelbrock Performer setup but you could have been much better off on your choices unless you are planning on staying as close to stock as possible with just a touch of performance.

If it were me, and actually at the current time it is because I too am buidling an engine for my Dart Sport, I believe you should have looked a bit higher as far as lift/duration on your cam. The other item I would have changed is to go to an Edelbrock RPM Air Gap vs the Performer...this is a MUCH better intake than what you are planning on and it still will give you the benefits...plus more, that you will get out of the performer intake. Because of the dual plane setup your fuel flow will be more efficient when it enters the cylinders but by adding the Air Gap under the plenums you cause them to not heat up which keeps the fuel mixture denser as it enters and getting you more bang for your buck. The other thing is that the RPM Air Gap is designed for a much better power range of of 1500-6500 instead of idle-5500 which will give you optimum fuel flow at all ranges instead of just the low end up to just under cruising speed.

Of course, it is your car and engine, and this is just my opinion, but if performance stats is what you want from this build, these couple of changes alone will benefit you greatly.