Differences between 81 & 87

[Roper]

I have a 81 with a GM LM1 crate motor in it. I also have a stock 87TBI. Both are 350s.
Im worried about the enviromental wacko movement up here in Canada.Worrried about possible smog testing in the future.
The 81 has absolutely no smog gear and no chance of passing any type of test if they come out with one. How hard would it be if necessary to take the fuel injection and smog gear off the 87 and put it on the 81? Example I guess the brains are in the cab on the 87. Would I have to swap the cylinder heads to get the headers to bolt on?
See the 81 is a 1 ton 4x4. The 87 is 2 wheel drive. Everything is new or rebuilt on the 81 except for the body. The 87 is low mileage(80,000) and in excellent condition in every possible way.
I want to finish the 81 but im scared of dumping another $8000 in it to do the body. My luck they would come out with smog testing or the price of gas will double again. I already have $20,000 in this truck.
Wondering what my options are with these two trucks?
Example put my 4x4 running gear under the 87. Then I would have a finished truck thats fuel injected and has all the polution junk on it.
Problem with that is i would be throwing away the new crate motor thats in my 81
Put the body of the 87 on my 81. Then I would have a nice truck that couldnt pass emisions testing if they come out with that in the future unless I transfered all the electronic, emmisions junk on to the 81. This would be way more work I think than just doing what I said before, example just put my 4x4 running gear on the 87.
Another option might be to just take the front clip,doors and box off of the 87 and put on the 81. Then take it somewhere to get painted.
Worry about the enviromental crap when and if it happens.
Oppinions?