To continue my prior comments. I have noticed that there still some confusion on the differences after the H. Althought, they look very similar. To reacap...the UH-1 with the tailrotor on the right side is a UH-1 II (H airframe with Huey Cobra engine, transmision, main and tail rotor blades, and tail rotor gear boxes). The Huey 2s are instrument rated and can carry more payload. If you see a UH-1 that looks like a Huey 2 but, has the N model nose, that is a UH-1 Super Huey. This more aerodinamic nose gives the Superhuey 7 to 14 more knots of speed.
Some of that is correct and a lot is inaaccurate. Beside sthe Huey II, the Bell 210, civil Bell 205A and the USAF HH-1H are all single engine long bodied Hueys that have right handed tail rotors. The Huey II does use the L703 engine of the AH-1F but the tailboom, drivetrain and transmission are all 212 components. The 212 nose is, in fact, a customer option for the Huey II and many have it so the pointed nose in no way designates a single engine Huey as a "Super Huey." NOt sure what Super Huey means anyway as it has been thrown around for several variants. The TH-1H flown by the USAF is a Huey II with three large MFDs instead of the traditional steam guages and they all have the pointy 212 nose. There are a number of non-OEM mods to Huey such as the Huey Plus that are out there as well.
The UH-1N is a Superhuey with 2 engines. These 2 engines together provide the same shaft horsepower of the single engine Superhuey but, having 2 engines provide more safety while operating over the water. The concept is that if you loose one engine over the water you might continue flying if at the right single engine airspeed. If not at the SE airspeed, this will assist you in a controlled landing or ditching instead of crashing. The Bell 412 is the civilian version of the N model but, with 4 blades in the main rotor.
The civilian version of the UH-1N is the Bell 212. the Bell 412 is an entirely different helicopter with a totally different rotor system.
The UH-1Y Venom is a complete different animal if compared with the 412 and N. This is the airframe of a UH-1N with re-designed cowlings, bigger engines and capable of handling precision weapons systems (the body of the N with the power train of the AH-1Z). It can be compared to the power of a UH-60M Blackhawk in the size of an N.
The original UH-1Y prototype was a redisgned UH-1N but are now totally new aircraft built in the Amorillo factory by Bell.
Some single engine UH-1s use a different intake filters and/or the toillet bowl exhaust (Usualy the military and from the Huey 2 and later civilian vesrions). Other differences like antennaes, drain ducts, hoist, fry bars, spot lights, cameras, taller skids, and gun/rocket pods are just little details based on operational requirements of the operator.
My recommendation is, look for a picture of the right model that you want to build (D,H, II, Superhuey, N, Y....) and build it like that. Don't forget to see on what side is the tail rotor. You will be close to reality. I usually use the concept of keeping it simple.
I hope this helps.