A little history and a few questions. I've had my '59 B61 for 5 years or so and it was restored by the guy I bought it from. It was originally a tractor but they mounted a Stainless Steel Fruehauf box with lift gate to it. The lift gate makes this truck extremely handy, and also has foot controls so you can control the deck while steadying your load. I think the engine/trans are from a '60's R as it's a turbocharged diesel mated to a 5 speed. I moved to the Seattle area in May and just flew back to drive the Mack up. I'm retired and my hobby is vintage cars/trucks. I filled the Mack up with my shop tools/parts etc.... I don't have a CDL so I titled the Mack at 24900 GVWR so I could stay under the WA 25K gvwr requirement. The first weigh station I stopped at showed me at 23400 loaded, so that was close. The Mack had always run good for the years I had it, but I had a full service to include all new tires before I left. Nothing major was found, just fluid/filter changes and a minor radiator repair. I drove straight west on I10 from Austin to LA and then North on I5 to Seattle. There are less mountains etc... this direction then a straight diagonal and I wanted to take it easy on the Mack. It was 2500 miles and only about 300 miles extra then the more direct route so worth it for me. Mack Performance on the drive 1. Overall great! 2. Speed: Top speed is ~65mph on the flats. Low speed was 40-45 on the climbs. 3. Temp: Average ~180, Low ~ 150 in cool mornings or cruising down a 6%, High 228 climbing up a steep grade around LA and one spot in the Shastas. 4. Oil Pressure: 40-50 range Issues/Questions 1. Transmission jam - my only real problem is that the trans jammed on me twice. I was able to unjam it the first time, but the second time I had to call a guy. If I came to a stop in first on an incline and allowed the truck weight to rest against the gear before shifting to neutral or applying brakes then I couldn't get it out of first. Very strange, it didn't even seem like the stick moved at all, but internally it moved enough that the trans was no longer in first/neutral. When I let the clutch out, the clutch would burn but the truck wouldn't move. The first time I was able to muscle it out. The second time was worse and I didn't want to put anymore pressure on the stick so I called a guy. I figured I just needed to hook up a strap and have him slightly pull the Mack to get the weight off the trans and the stick would pop out, which it did. He thought there was an issue in the trans at the shifter, worn parts etc.... I'm wondering if it's just a clutch adjustment. If the clutch is fully releasing, shouldn't that take the weight off the trans? or are there some worn parts on the shifter I need to look at? 2. Throttle lock cable - The one that came with the truck didn't work so I had my mechanic friend install a new one. Unfortunately, he didn't get the brass plug at the end adjusted so it was of no use. Due to slack, the cable would only lock the pedal around 50mph. Therefore, cruise control was my foot for 2500 miles. I tried to adjust on the road, but crawling underneath and trying to reach up to it, no way. I looked at King Cruise for a cruise control but before I left, but didn't do it. Has anyone installed a King Cruise control? Worth it, or just get the throttle lock cable adjusted? 3. Book/Manual - Is there a recommend book/manuals out there for the B61 and engine/trans (along with identification info so I could ID my engine/trans)? Thanks for any info/advice!