but not sure of how to get there with the correct parts. Especially with the entire drivetrain swap. Bare with me because I do not know what will fit with what but here is what I want to end up with. As of now I run a stock 400/350/203 combo with D44 and 14ff. I have a 454/400 out of a C20 crew cab PU. I want to swap out the 203 with a 205. This is where my questions begin. What 205 am I looking for to match up with the 454/400. I have no clue of what year models, splines, and whatever else I don't know about to be looking for. I also want to swap out the D44 with a D60. Will the conversion to the 454/400/205 and D60 change the lengths of my driveshafts? Until I get the D60 will the driveshaft length for the D44 pumpkin work? Any advise would be helpful. I will be hitting the local junk yard next week on my vacation week. Thanks I forgot to mention that the t400 bell housing would be swapped with a pre 71 to install a heavy duty sprag. I think that is what my transmission guy said..... I dunno???