I have a th350 that has a np203 attached to it, and im swapping it for an np205. I already have the 205 sittin in the garage. But now my question is.....the truck that i took the 205 outta was an 1980 3/4ton chev, and i think it had a th350 in it as well, but then i got told that both the th350 and 400 are 3 speeds. Which i didnt know, i thaught only that 350 was. So is it true they are both 3 speeds cuz i never looked at the oil pan too see which one it was i just went by the number of gears it showed. So if it was a 400 and not a 350, will this 205 still bolt up to my 350 or no? I took the adapter, that was used on that truck aswell, so i have all the parts, but need to know whether it'll work or not. Thanks and sorry for the long question, im just tryin to get this all done and figured out before the next 4x4 comp. this summer.