So I can't remember if I had mentioned this before but about 2 years ago I randomly lost a little clutch fluid which caused the pedal to be a bit spongy. I found the fluid level to be a little low, topped it off and it was fine for a while. Several months later it happened again. I looked all over and couldn't find any fluid leaking so I assumed it was the slave/TOB. It did it once again a month ago, and finally realized it had to do with cold temperatures. Some rubber seal must be shrinking when it is cold enough out to let fluid pass by. I kind of forgot about it until yesterday, went to drive the truck after a cold stretch where we had wind chills below -20, and I had 0 pedal. I checked the reservoir and it was empty, even the line. This time I could see the fluid dripping from inside the bellhousing area. I filled it back up and still had nothing, ended up having to bleed the system to get the pedal back. I decided it is finally time to do the engine upgrade since I should replace that sooner than later. As a temporary fix I bought some of the "universal" stop leak and ran that through, hoping maybe it will condition the seal to keep it working until I am ready to pull the engine. Seems to work but is a little thicker than brake fluid so the pedal feels a little sluggish but I can deal with that. I was originally trying to decide if I wanted to rebuild the 454 in it, find another big block, or LS swap. Ultimately I decided I will be rebuilding this one to keep costs reasonable since I know the lower end is good. The plan is to keep it more towing oriented, keeping the factory heads but upgrading the cam/lifters, and also going to a dual plane intake and carb. I want to keep the compression fairly close to stock so I can continue to use 87 octane fuel. I spent the afternoon watching videos and researching parts to decide what I wanted to order. It does have low compression so I do plan on completely dissassembling and as long as the cylinder walls look good I will just do a dingleball hone and replace the rings. Hoping to get started on this in a couple of weeks, I want to wait until I have all of the major parts on hand. Either way I will need to get a valve job done on the heads because I think thats where some of my issues are coming from as well.