Identify This Supercharger

-What identifies it as a 2300 Heartbeat versus a 2650? Is it the height, fuel rails; etc?
-What application (Vette, CTS-V, truck; etc.) was this unit for?

I ask as I am considering the Heartbeat for my build which is a '77 Pontiac Lemans (CanAm). The size isn't so much about total power or even power under the curve but rather about overall efficiency. Would the 2650 version and its increased volume (no idea if the cooling bricks are bigger) provide better cooling for endurance/road racing? I recognize it takes more power to drive the 2650; the goal is to optimize cooling with lower boost levels while running 700-800 rear wheel on 93 octane. if the supercharger cools runs cooler and I can rely on one large C&R front intercooler versus having to add additional twin side intercoolers it will reduce the expense and complexity involved in my Pro-Touring build.

As to the B-15 in my application, I learned a Dailey dry sump will fit on an LS wet sump application, and I think Wegner has a front drive (with AC) for it? If the B-15 will endure that type of racing; then you are correct; building a custom engine will be much more expensive and unnecessary. I would rather upgrade to a better dry sump system than spend it on a long snout dry sump rotating assembly which takes me down the custom build path.
GM LS Production Right Side | Dailey Engineering

Its a 2300 set up for LSA 8 rib drive. They can make up to 840whp or so with the correct supporting mods on a 376. 700 is a reasonable goal with one

The Magnuson port 2650 for that setup just came out this past fall and looks completely different.

Thanks to all; what's interesting is it seems the Magnuson Magnum 2650 has the same basic height as the Heartbeat 2300 (which is almost identical to the LSA and Kong 2650, but slightly taller than the ZR1 2300). If my goal is 725-750 rwhp with the most efficient supercharger (design of rotors, efficiency of bricks) with large enough port volume and efficient cooling is there a road racing front-runner?

Assumptions: It's on the B-15 long block and I have ample room for a large front intercooler and runs 93-octance gasoline (I have no desire to run methanol, interchillers or racing gasoline). I will consider a couple of gallons of E-85(add DSX flex fuel kit) only as a way to spike the inconsistent nature of 93-octane in Texas. Street use 50% and road racing 50% in conditions between the Dallas, Austin, Houston triangle that see very hot conditions.

My take; certainly not based on real world experience:
1) ZR1 2300 with Matt's lid and C&R bricks
2) Magnuson Magnum 2650
3) Magnuson Heartbeat 2300
4) Kong 2650 with a non-Kong lid
5) LSA ported supercharger with Matt's lid and C&R brick.

Not in Contention: Kong Lid