You might just get away with it.
First off, the tank. A few of those lightning models have escaped over here to the UK. Along with the AVL 350 Thunderbirds that replaced them, the front tank mount is the same as the normal Bullet, so a classic iron-barrel tank the normal shape certainly will fit. Now of you look at the 350 Electra tank, if it has the pressed steel flange at the front with a ⅜" or 9.52mm hole for the through bolt which passed through the rubber bush pressed into the frame (the bush has a steel inner sleeve), same as the normal Bullet tank, you're good to go. There should also be a couple of welded on mounting tabs at the rear of the tank to line up with the head-steady lug on the frame. Not sure if these use the bolt-one petcocks/fuel taps or take a classic British type screw-in item with the ¼" BSP thread, unless it is a fuel injection model, which would need an adapter plate in place of the fuel pump for you to fit the petcock/fuel tap.
I know the RE have changed the design on more recent fuel tanks, and the front no longer has provision for the through bolt. I THINK this was well after 2011, but I'm not sure when!
Next.
OK, the forks.
The Lightning forks are the same fitting as the classic iron barrel Bullet, they screw into the Lightning's iron top yoke with a right-hand fine thread, I think it's 1⅜" x 24TPI.
The 350 Electra forks may or may not fit, as the Indian factory produced different type of leading axle forks for the UCE 350 Bullet range, some had the same external screw thread on the fork tops as the older models, some had plain tops which bolt into the top yoke. If that Electra has the screw-in forks you can use them in your Lightning top yoke with no problem, I know they even fit some of the old UK built Royal Enfields. With the plain fork tops (these first appeared on late AVL Thunderbirds) you would either have to get a later Thunderbird top yoke (I already have one which I am not using), or get a machine shop to bore out the threaded part of your lightning yoke to 35mm.
Hope this helps.
A.