Auto is a ZF and very stout...ZF sells transmissions to BMW and a whole host of other manufacturers besides Land Rover. It is not computer controlled in the Discovery 1. I believe 1996 was the first year for coil packs, you will need the ecu, maf and associated components all matched together. if you have the whole vehicle, you will have everything you need. 1997 went to advanced evap and has more crap on it for emissions control. The advanced evap trucks have a big square evap canister on it's side with hoses and wire plug out the inboard end between the washer bottle and the water reservoir with the fuel pump relay between the canister and the reservoir. The fuel pumps are different on these trucks too. The standard evap trucks canister is cylindrical with the hose fittings and plug on top. A 1995 should be a distributor truck. You will not be the first to put a series on a D1 chassis. Remember, the wheel base on a D1 is 100" so I hope your plan is a 109 because I do not think the D1 chassis is very easy to shorten. You will have to remove the rear cross member and weld on a series rear member. Body mounts should be relatively easy. I'd keep the floor pan so you can utilize the D1 seats and center console.
2003 Disco SE7 expedition prepped
1998 Disco LSE 7 50th anniversary Baluga Black
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1969 Series 2A 109