Top end Performance sells a Bolton blow through turbo kit for the 2.6 Monteros and trucks. Its definitely not cheap and could be assembled by sourcing the parts yourself, but it gives you the idea of what it takes to do it. The 81 2.6 may have flat top pistons rather than the dished pistons the 79 and 80 2.6 has, but it is not a big issue - 7-8 psi would be all you could run on stock pistons anyways. Once I decide which way I am going on my engine builds, I may selloff some of the parts I won't be using, like the modded magna intake, weber dual side draft manifold and carbs, and the 2.0 turbo exhaust manifold with matching turbo. Nothing is for sale yet, so don't ask. I do have a DCOE weber intake to use on the air inlet side of a turbo that I will not need that I will be posting soon - it was part of a setup I bought for a Toyota turbo conversion I was going to use until the Magna intake dropped into my lap. Look for it in the For sale thread.