Swap from TH-350 to CADDY TH-400?

['70 C/10 SS500]

My 500cid Caddy motor is (as of last night) bolted into my truck. I have the stock Caddy TH-400 on the motor just as it came from the Deville. My question is what do I need to do if anything to the shifter linkages and the selector bracket on the drivers side of the tranny? My truck was originally I6-250/TH-350. Sorry for not doing my home work before posting, but spent all week end getting motor in truck. Also, it's good to have some pointers going into the problem to give a heads up about what to do. So, that being said, any ideas on how to hook up the linkages to the TH-400? Truck is a '70 C/10, SWB

OH, while I have this post open, let me ask another question. Does anyone know if pre-formed tranny fluid lines are availible for our trucks? Are there any differences between the 350 and the 400 cooling lines? I'll bend them myself, but if readily availible one at a reasonable price are out there, I'd rather do that.