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I'm running a 468 with 10 to 1 Brodix heads; Have 520 lift/520 duration 280/280, RMP 2-6,000, separation 110 with 2.37 gearbox and a 3-bladed R prop turning 5,000.
Would I gain any power changing the cam to a Lunati 101107021K, 530/542, 262/268 lift 530/542 with an airgap manifold ?
Any advice would be appreciated as my knowledge of cams is limited
Lowering your duration and widening your LSA typically will afford you more usable lower rpm power.

What is the duration @ 50' as opposed to the advertised durations you have posted.

What is the Lunati love separation angle ?
Thank you for the reply. I don't know where to find the lunati info you're questioning other than the description I gave.
Any suggestions/recommendations would be appreciated!
I searched that part number on the Lunati site to look for specs and the number was invalid?

There were several close but a digit off ?

What it appeared to me to be was a traditional flat tappet hydraulic lifter series.

If your funds permit I would suggest moving into a hydraulic retro fit roller camshaft as it will afford you more time under the valve and generally better over all performance. Discuss this with your mechanic or the engine builder and see what they say.
Lunati website:

SKU 10110702LK
Hydraulic Flat Tappet Cam. Mid-Level performance street cam with excellent drivability. Exceptional replacement for muscle car type cams with automatic transmissions. Works well with stock type exhaust manifolds and dual plane intake with mild 4 bbl carb. This is an awesome 4X4 and performance marine cam; Advertised Duration (Int/Exh): 262/268; Duration @ .050 (Int/Exh); 219/227; Gross Valve Lift (Int/Exh): .530/.542; LSA/ICL; 112/108; Valve Lash (Int/Exh): Hyd/Hyd; RPM Range: 1400-5800; includes: Cam & Lifters (#71817PR-16)
It should work fairly well if your wanting a flat tappet cam. The LSA is 112' which will help to spread the power out a little more than the current cam shaft does. The spec you posted on the current cam is an advertised duration, what most builders use is the true duration at .050 lift as it is a real point of reference. The cam companies can play with the numbers a little on an advertised duration making comparisons inaccurate.

If going off of the advertised number you will be lowering your duration apx. 10' degrees which will move your rpm / power max down about 500-600rpm. This is a very crude determination but one we use to estimate effect of a duration change.

Based on the traits listed the rpm range looks fitting. I expect 2600-4200 will be the range it performs best. Up high above 5400 it will start to go flat but you probably don't run up that high very often anyway. Go flat means the noticeable pull will fade up high, but your power will start to come in a little earlier and be more consistent as opposed to now you may hit a certain spot where it seems a bit peaky. The new cam will act more alive off the throttle and should help you to gain a small amount of snap if all things remain equal.

These are generalized expectations and every engine will act different based on the unique components. If your currently finding your max engine rpm is 5,000 then the new cam would probably offer a bit more snap and bring usable power in lower on the rpm scale.

I think those new cam specs fit a 2.37 drive well.

Give the Tech line a call and run my opinion and projection by them and see if they concur.