Force

Yes, they didn't change the chassis designation when they changed suspension. Both the W925 and K123 kits got the same Hendrickson RTE 3 hanger walking beam suspension about the same time, so when the W925 originally came out the designation was correct but the K123 was wrong as both had torsion bars, now it's the other way around since both has walking beam, the W925 is wrong and the K123 is correct.

I don't know why the Asian model companies do the discs grooved, I have seen several examples of that, the discs/rotors can be ventilated, slotted, drilled or nothing, but they have flat and smooth surface with no grooves what so ever.

For the Cannon Ball Run Countach there are only two alternatives as I see it, Fujimi Enthusiast Model EM series wich are full detail but they have curbside versions also and I believe they are RS series, or the Aoshima kit. The Fujimi kits are demanding to build as the body with flares and everything are separate pieces but with patience it will be a nice model. The Aoshima kit is a bit simpler than the Fujimi EM series kits but easier to build, and it looks good (I have one of each). So if you going to build an accurate model of the Cannonball Run Countach wich was a 5000 Quattrovalvole (QV) you need to go with either of these two and add the front wing.

I don't know for sure because I'm no Peterbilt expert like Tim Ahlborn, but it could be that it wasn't a window there at all and you could open up and close for ventilation. I can't access his website any more where he had a spotters guide to the different peterbilt models, I know I have seen something there about this sliding panel on the old Peterbilt cabs.

It's probably one of Dave's own left over after he passed a couple of years ago but they don't have any production as far as I know. Dave Natale was into Mack trucks and built many of them...and of course casted them.

The AMT kit is a newer style cab than the Duel truck cab, the Duel truck was a 50's cab as the 281/351 came 1954 and the Duel truck was a 1957 after what I have found out during my research, the AMT small window Unilite cab California Hauler kit is a 60's cab, the 359 came 1967 and the kit is from 1969. About the rear window, yes it's a sliding panel.

AITM is on facebook and run by Dave's family, but they don't have much for sale other than leftover parts and I don't think Dave's son casts anything, it doesn't seem so...so I can't really say they are up and running. Keystone still has their facebook page but they for sure are out of business.

American Industrial Truck Models is no more since Dave Natale passed away, Doug Wagner at Keystone Aluminum Model Miniatures had AITM stuff a while but there was a glitch somewhere and he closed up shop and some of the AITM stuff got back to Dave's family.

No rivets, or huck bolts as they are refered to.

Years and years of modelbuilding and research on upcoming and planned models. I like to get my models as accurate as possible. Another thing, I've been around and been tinkering with cars and trucks all my life and I have an adjucation in cars and body and also have a class 1 license to operate both trucks and busses, and wheel loaders and excavators...so I have learned how these things work.

No problem. The engine in the AMT Peterbilt 359 1100 series cab truck is a NTC 350.

Don't mention it, if I can help I will. Most of the engines with turbos back in the day only had one, the twin turbo setup on inline six engines is a more recent thing, both Caterpillar and Cummins had twin turbos on some of them and Cat still do on some engines, but Cat stopped doing engines for on highway trucks back in 2010 so after that you couldn get a Cat engine in your truck. V8 and V12 is another thing, they could have one or two turbos...or none at all. That looks convincing enough so go for it. The engine in the AMT Kenworth W925 and K123 is a NTA wich is not that common, the most common Cummins is the NTC version wich came in different horsepower ratings, but you can of course use the NTA if you want to, both are 855 cui engines and the visual difference is mostly in the oil cooler area. I don't know what engine was in the Bruhn K100 and you can't see it so use whatever engine you like, engines available back then was Cummins and Cat 4 stroke, and Detroit Diesel 2 stroke, all in various configurations.

You are welcome.

Here is the oil system. The scavenge pump wich suck the oil from the pan is at the front, the forward outlet goes to the oil tank and the rear is where the oil from the tank gets back to the engine through the standard oil pump, the filter housing is not used and replaced with an adaptor for remote filter and oil cooler. Here is the adaptor for the remote oil filter and oil cooler and back into the oil gallery in the engine, one out one in, the brass piece is the oil pressure sensor for the oil lamp and the outlet for the oil pressure gauge.

Here is a couple of öpictures of the cooling system.