4 speed?????

[im tha best]

I found a Muncie 4spd on craislist. i talked the guy down from 150 to 75...said it came out of a 71 duly that was used as a wrecker every once and a while, winch and everything, whole nine yards...so i was wondering if that would be a good thing to do or just rebuild the 3spd i have now. he said it works prefectly fine and there isnt a thing wrong with it, i have to check it out to make sure, but thats what im going off of for now. i have a 250 Inline and as i've read they bolt up with no problems but i might have to get a new clutch because im not sure what kinda spline it has....just let me know what you think