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1973 C10 "The Purple Truck"

Basic build
Overview Gallery Discussion
The LED side markers came with a ground wire in my case. The front markers I just installed use a bulb base that goes into the factory socket but there were 3 wires.

After all this discussion it occurred to me I didn't check to see how the turn signals operated with the headlights on, so I checked last night. With my setup now both the front marker and side marker flash together with the headlights on.
 
mrk5 said:
The LED side markers came with a ground wire in my case. The front markers I just installed use a bulb base that goes into the factory socket but there were 3 wires.

After all this discussion it occurred to me I didn't check to see how the turn signals operated with the headlights on, so I checked last night. With my setup now both the front marker and side marker flash together with the headlights on.
Click to expand...
The difference being this is a replacement housing rather than replacement bulbs.
 
In another thread I've discussed my problems with the ProFlo4 https://ck5.com/forums/threads/edelbrock-proflo-4.335548/post-4200345

I really miss driving this thing every day. I'm thinking about putting the carb back on. The biggest hurdle I see is the fuel system. Is it possible to turn a pump down to 6-8psi thats designed to run at 43psi? I have an adjustable regulator, but maybe it won't operate pressure that low?

The other option is a different pump which isn't too difficult since I have an external pump. Would need to bypass or switch the regulator too.

Planning to replace the entire motor next year so I could just run the carb until the motor swap.

Just thinking out loud with this post.
 
You can get a bypass regulator that works at the lower pressure without any plumbing changes, several companies make one. Your return line will likely need to be at least as big as your supply line or it may not flow enough to drop to carb pressure at idle. Holley actually sells a regulator that comes with both EFI and carb springs for people that want to make changes like that.

You can see how low your will go, but more than likely you will need a different regulator, or a different spring might be possible, depends on the orifice size, pump flow, spring rate, preload, etc.
 
You can urn the pressure down with a regulator. But the pumps do not like it and seem to fail with time. If you are putting a carb back on it, swap the pump also. Then you will still have the good pump for the FI with the new engine. Unless you are going LS conversion.
 
I'm planning on another 350. I know a modern engine makes sense for this truck, but I can't get over my love of nostalgia. I suppose that's why I'd rather be driving this instead of our '08 Silverado.
 
In the meantime while I wait for Edelbrock, I ordered a new engine for the C10 back in October. It arrived Wednesday.

20220128_084806.jpg

It's a roller cam block with Dart Iron Eagle heads. I wanted the newer block but needed to be able to use the old style intake bolt pattern. Supposed to be 345hp.

Now I'm thinking I give Edelbrock another month and then I'm going to put this motor in with a carb. I have parties interested in the PF4 whenever I finally get my parts back from Edelbrock. I'd love to tear the crate open, but I don't want it sitting uncovered for another month or so.
 
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