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Thanks for the ideas Glenn and Fred.
The vents are easy, so I'll check those first.
Yes, it drops boost as it looses power. Doubt it is air cleaner freezing up as it has been plenty warm outside yet. I will get a gauge and see what happens. It is kinda random and would have to take a long drive to hope to have it repeat. I might look into getting an electric version so I can mount the gauge permanently in the cab?
That overflow/check valve, is that the little brass fitting between pump and return line to tank? Maybe it is returning more then it should? Loosing fuel and power.
So the b61 I am working on has a 711 in it according to the paperwork we got from the museum. I am looking to reseal the engine as it has some oil leaks that would need to be fixed prior to repainting. I know a bunch of the gaskets can be replaced with either a copy cut from sheet material or the permatex grey sealant. However things like the rear main, front crank seal or head gasket(s) need to be replaced with correct parts. Does anyone have any knowledge of a source of parts like these?
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Talk about a small world... I just posted a question here a few minutes ago about a BCR truck. Had NEVER heard of such a thing. Then, I find a few photos of yours on the net!! You do have a special truck there my friend!!
66DC75, on the subject of single axle tractors, before the steel industry went offshore in the early 80's, there were guys hauling big coils out of Homestead, and the other Pittsburgh mills with single axle gas jobs and 2 or 3 axle spread trailers. One Chevy I knew of was a 427 with a 5 and 2 speed axle.A tractor like this weighed 10000 lb or less and could legally haul a 50000 single coil! Any single over 40000 lb was automatically a permit load anyway. Most of these ran local,mill to mill and sometimes as far as Cleveland. These loads paid outrageously high rates,and many otr drivers in their high dollar Pete's and KW's were unaware of what these dudes were earning!,and made fun of their cheap little gas jobs that only lasted 100000miles! Of course they just took the abuse and went to the bank!!