http://www.roddingroundtable.com/tech/articles/driveline.htmlThis is where I got the information from. I also read a lot over on the H.A.M.B. site. Those that seemed to build a lot of cars and chassis agreed that as long as the angles equal each other and yokes were in phase, the shaft will rotate smoothly. Is it ideal to have one point up and the other down, not really, but in some cases, it's the only way.
I brought up race cars and accelerated launches, because not knowing how this truck will be operated, I thought it might be interesting to the owner. A heavy load can change the pinion angle just as much as drag racing does so if he was planning on really working the truck, an extra degree at the pinion might not hurt. Is it needed, probably not, but information is free and doesn't hurt to have.
I know the 250 in my truck is slightly nose down, it was level when I set up the chassis in 2000, but I have since lowered the front and added bigger rear tires and have found no problem with setting or tuning carburetors. I suspect 99% are set level, but there is always the 1% that are not and still work ok. Getting close is all you can do unless the whole weight of the finished truck is setting on the springs. You can't assume the frame will be level, so unless you are 100% sure about the frame angle, then the carb angle is just a guess. I doubt most gauges are true anyway, thats what I mean when I said to get it close.
It's like your quote says, "we all have our opinions", it's up to the end user to decide whats right for them.
Joe
