You can run whatever cylinder head and carb you want, will it make optimum power for your combination, only the Dyno or GPS can tell you that.

I have old Dart pro1 310 on my 580 cid and numbers are good. I should have the flow bench numbers sometimes this week but my engine dynoed 720hp 5500 rpm and 760 lbs torque around 3500-4000. I'm sure the 345 should be more than enough except if you want to spin this up to 6000 +++ rpm

Small heads
 

I have 615cui engines with 14-71 blowers.
originally built by Tommy @chief engines. And he did set them up with tiny dart 320 heads.
On the dyno after refresh we did see that the Hp curve never stopped gaining. We did stop pulling at 6100rpm but the dyno always turn the engine a couple hundred rpm over and the Hp curve didn’t stop. On the dyno cheat it says 1080hp @6100rpm but we did see just under 1200 up around 6300rpm.

I don’t know what’s right, the heads felt small when I was working on the engines but I figured that Tommy knows what’s his doing and probably had a good reason putting this heads on (or did he just had them laying around) so I left them and planning on a change on the next refresh.

just head size for perspective my 2cents

He put the same heads on my buddies 675hp 6-71 blown 540’s. I’m beginning to think he just used what he had.

Way Back in the day, all there where for aftmkt heads where basically the Dart 320’s, Dart 360’s, and Dart Big Chiefs. Many different shops had porting programs on them, though.

Dart
 

hey what kinda cam ,compression