Hey fellas.. I'm on the home stretch with the 400-429 swap into the camper special thanks to all the help I've gotten from you guys.

I started the engine for the first time since building it and I gotta say I was so relieved it ran. But after playing around with it I find that the oil guage is reading high when the key is on, engine off. I unplugged the sensor and nothing changed. But when I start the truck it goes down. I'm using the old sensor that was in the 429 but I still have the sensor from the 400 I could try. It worked just fine when the 400 was in it and as far as I know I didn't mess with any of that wiring. I'm quite confused.

Also seperate question.. I think my timing is pretty good. But when trying to start I get real high flames shoot out the carb sometimes. So I give it a few shots of fuel in the carb(with bottle) and then start it and no flames.. is this timing or lean fuel? Truck doesnt stay idle without a little help but to me sounds quite smooth. Personally feel it's a mixture thing. But anyways need to be sure I have oil pressure. I ran a drill on the pump during the late stages of the build and I did have good circulation so I'm not quite sure.
-Think I attached a short video of it running and dying.

 

Are you talking about a factory oil pressure gauge? I wouldn't know how to check those, but if my aftermarket gauge read high with key off, I'd first check the power wire with a multimeter to see if it's somehow getting power all the time. If it's getting power, I'd suspect a bad ignition switch. But more likely it's the gauge that's gone bad.

Flames shooting out of the carburetor makes me immediately think the ignition timing is too far advanced. A very lean condition can also cause flames to jump out the carburetor. Usually with a lean condition, it'll just flame, but not throw fuel out and catch stuff on fire. But it's still bad juju for the pistons and valves. If it throws fuel and flames, I'd suspect a very rich condition, or valves stuck open, or the camshaft is too far advanced. There's two gauges that can be a big help here. Air / Fuel Ratio, and vacuum gauges. How the A/FR gauge helps is obvious. But the vacuum gauge can tell you a lot of things, in this case, if you've got valves stuck open, or valves open at the wrong time (camshaft timing).

 

If you ground the wire the gauge pegs

 

The only wires I had messed with are the coil wires. The positive got ripped off before I started work on the truck. And I had taken a video off what was in place already. So dark green from computer went to negative pole + tack. and Red Live wire that had gotten ripped off went to positive pole.
-I replaced the starter wire because previous wire got cooked I guess.
-shortend negative batt and bolted directly to block. Below cylinder 1.
ELectric choke I grounded to the metal coil bracket.
and positive to a switch that used to run an electric rad fan.
That's all the wiring I had done.

As for the flame. It only happens sometimes and only at start up if I have to crank it a few times. When I set the timing I double check it and set it to 12° advance from zero. First time by hand without starter hooked up. And second time with starter hooked up to assure I was on compression stroke still read 12° at that time also.

 

Well fellas.. I swapped the sensor from the old 400 out with the one I had and that fixed that. Oil pressure is good.

And you guys are gonna laugh but I forgot to hook up the PCV line and that's why she wouldn't idle.

It's %100 now attached a video of it start and run.
Just gotta burp the rad a bit and burn the paint off the headers cuz they smoke a bit

 

Yeah, you're the only one of us that forgets to hook things up.