1989 B2600i info

Hello, i just bought a 1989 Mazda B2600 i 4x4 reg cab short box. I was going to get a Toyota 4x4 but i bought this insted. I dont usually buy a vehicle unless i know almost everything about it but this time i did. I mean i have seen B2600 i's before, but just never looked into the specs. Now that i have one i cant seem to find anyinfo on them. I am looking for the engine specifications for the 2.6L. Also if anyone knows the code name for the axels, transmission, and transfercase that would be great. I also heard that some stuff on these are compatible with the B2200?
I am thinking that maby i should have got a Toyota because there are alot more parts and aftermarket support for them. Although i am really happy with the truck i have i dont plan to do a whole lot to it, its 100% stock now except for aftermarket muffler. I dont think i could get a header for it? I am also going to be forced to custom make an intake too. I am looking to get as much info about the 2600i as i can. I would really like to have the specs, if anyone has a brochure that would be cool.

anyhelp is awsome

thanks