13g's are fairly uncommon, as they only came on 1g automatic turbo DSM's. If you can find one, it's a direct swap for the stock turbo, you don't have to change anything, because it still uses the TD04 center cartridge. Would be a nice upgrade over the 11b. Should be able to support 200whp with the right mods.

14b is more common, although they are still pretty hard to find, as most of them are old as hell and either blown or cracked to hell by now. This uses a TD05 center cartridge, so you need the oil and water lines from a 1g manual turbo DSM. You'd also want to upgrade to a 2g eclipse turbo exhaust manifold when you're doing this, and try to find a better 02 sensor housing as well, so everything matches. You can use one from any 1g manual turbo DSM or 2g/EVO I-III whatever.

If you use a 1g MAF on your 61t, it will lean you out, because it is larger than the 1.6L unit. You'll want an S'AFC to make up the difference, and you'll also want 450cc injectors, or possibly even larger like 560cc injectors from an EVO 8/9. Consider a larger fuel pump as well, as the stock one is only meant to support 135hp.

Thanks for the thorough response. I would prefer the 13b, then. Though I may have trouble finding one. I assume I can just hook it with the stock 13b wastegate and run it? What psi would it running at, any idea?

It's a 13g. Pretty sure the stock wastegate is around 9-10psi. Not enough boost to make the power you want to make.

Any idea how much power I would gain from switching over? Maybe 20whp (at stock psi)?

But to clarify - the 13g will bolt on the stock equipment w/o modification, including the stock downpipe?