You mentioned 600/650 on your cam. That 600 lift on int and 650 Exh??? A 244/248 duration on a 540 made peak around 5,800 with dart pro 1 310's as a comp. as everyone has mentioned good headers are crucial. Also a good intake you might look in to is the brodix hv2000 I believe for the 4150 flange or 2001 for 4500 flange. There's a couple cams for sale in swap I'd like to see what one would do for you. If I recall without looking back they are like 653/647-680/680. My vote would be a good used set but hard to find Eickerts, hv2000 and cam. Just my thoughts but I believe there is a decent amount of power left To be had. Especially with your heads and comp. Good luck and keep us posted.

Ya the darts among others were designed to tailored to ones needs by porting for a specific application. That cam seems like it was spec'd for a poor flowing GM exhaust port rather than much more efficient aftermarket cnc head. I'd definately replace the cam. Theres some good grinds out there plus there's always the custom route. Looking for the most gains I would go with the brodix hv or the profiler. Believe it or not 40 plus hp is not out of the question with just choosing the right intake for your combo and a some professional port work. I think your carb is just fine however could be a real easy test on the water if you can borrow a well tuned dominator and adapter.

Depends what your looking for in hp/speed gains and how much you have budgeted for. Just remember 15-25 hp might get 1-2 mph. Not really worth the hassle. A well thought out combo that could potentially achieve 75-100 gain would make it all worth while. There's a lot of threads on cams. I can think of a few but don't wanna start another cam thread.

Could work. I’d rather sell and start with a good one. Idk if there’s a fundamental plenum volume or runner length issue with the dart, porting might not fix that.

I'm in a rush at the moment but does anybody recall the thread on the 548 or 555 build like maybe started mid late winter. Regular on here but name not coming to me at moment. It was a good thread with different intakes and carbs on dyno. The numbers changed a fair amount. It would be nice to see about 4 more degrees duration and .050 lift on the intake side. endeavour32 changed just intakes and carbs on his old 509's with valakoized dart 310's with 741 cam/1.8's int. Pretty certain carbs were changed from hp 950's to qf 1000's and dart intakes to the hv2000. He can chime in to verify if he sees this thread. It was also suffering from lack of air. A few inches of hatch lift gained a couple hundred rpm. Regardless the change in carbs and intakes on his particular builds were very worthy.