Hey fellas- New to the club, but have learned a pile just reading the threads the short time I've been here- great site for a redneck like me from MT. Anyways, I've got an '87 K5 that's got 342's w/"35 and a t400. Hunting for a four speed that will stand up better than the 700R4's I've scattered in the past while trying to decide whether to go with 410 or 456 gears. The rig is going to see some off roading-though nothing like the majority of you boys do- but I want it to be able to cruise as a daily driver as well. I keep hearing that 456 is the way to go, but I think it might be a little too low for cruising down the highway. What would the set up be like with say a 4L80E tranny and 456? How about 410? Thanks for any suggestions.