360 pros & cons vs 318

Well i found a couple of 360's and a magnum which is out of my range for 1800 and needs total rebuild. So since im going with a 360. Which engine mount is it thats different? Or am i mistaken? I thought you needed a different mount for a 360. A different dampener ? I will be going 4 speed maybe 5 speed if i find a bellhousing for a t5 to mopar, cheap but definately manual transmission. So since im going the 360 route how much can i sell my 318 for? Any suggestions on where to price it?