Recent content by Don-T

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    High Flow cats on a Blueprint 383

    I imagine the cats should be as close to the headers as I can get them. The issue is the transmission and transfer case don’t leave much room. Would the casts be able to do their jobs if they are behind the transfer case? The cat inlets at 32” behind the flanges on the header collectors. I...
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    In your opinion?

    One of those came on my truck when I bought it. Holley says it’s a 670 CFM carb. They have been around for a long time. I still have it and will rebuild some time and use it on something.
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    High Flow cats on a Blueprint 383

    That is what I am doing.
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    High Flow cats on a Blueprint 383

    I will do that as soon as I can start and run it again. My fan came apart and took out the water pump, radiator, a couple of pulleys, and belts. I am waiting for some parts to come in. Maybe by the weekend. Thanks for the help.
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    High Flow cats on a Blueprint 383

    It is the 405 HP version. 9.5 compression.
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    High Flow cats on a Blueprint 383

    The engine is the 405 HP version 383 and it came with the vacuum can hooked up to the ported vacuum on the carb. I called them about it and was told that is where it needs to be. Do you believe otherwise? Wouldn’t that advance the timing at idle? Maybe that is what it needs to idle proper?
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    High Flow cats on a Blueprint 383

    I am working on the AFR when I can, mostly waiting for warmer weather. Right now I have 12.5 at idle, it won’t idle less than 1k in gear if I lean it much more. The cruise mixture is about 14 and wide open mix is about 12.5. When it warms up a bit more I will work on the tune again.
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    High Flow cats on a Blueprint 383

    Thanks Rick. I do think that would be a big help, especially when starting and warming it up in the garage in cold weather. I do wonder if the converters can get plugged up or burned out from the engine running a bit rich? I also wonder how they might increase back pressure and cause power and...
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    High Flow cats on a Blueprint 383

    I have a Blueprint 383 in my 73 K10. I have a dual exhaust on it with no cats. It likes to run rich at idle, about 12.5 to 1 and about 14 to 1 cruising. The fumes when idling are pretty bad. I am wondering if a pair of cats would help any with fumes and would they cause any problems?
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    Need to fix noisy ring and pinion.

    Well I have the rear end figured out. I decided to buy a Yukon ring and pinion set and put them in to replace the Richmond gears. I set it up with a good pattern and now I am happy with it. There is no more gear noise from anywhere in the truck. Unfortunately I found out the hard way what a...
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    Need to fix noisy ring and pinion.

    Thanks for the reply, I have heard that a time or two over the years. I have also heard a lot of shops use that excuse when they don't get it right. I have had people tell me it also depends how the gears are cut. The gears I have in the rear now are Richmond. If I buy a new set I will get Yukon.
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    Need to fix noisy ring and pinion.

    Last summer I paid a shop to rebuild the 12 bolt in my truck. It lasted about 30 miles and the pinoin was floping around like a fish out of water. I took it back to them to do it right. It seems all they did was retighten the pinion nut and call it good. It had gear noise. They pretty much told...
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    Wiring--Engine Heat Protection

    I bought something called DEI Fire Sleeves from Summit Racing. Very similar to the plug wire sleeves.
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    shift indicator

    I bought mine from LMC as well. Works fine.
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    Shift Indicator

    The plastic was broken on my truck as well. I removed the remaining plastic then I drilled a hole in the metal dash behind it. I used a piece of 3/8” chrome plated fuel line with a flare on the end. I used a longish sheet metal screw to pass through the tube to mount it to the dash in place of...
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