75gmck25's latest activity
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75gmck25 replied to the thread Idle timing.6 is factory spec, but that was a smog era setting that was very conservative. Most stock engines work better at about 12, or even up... -
75gmck25 replied to the thread 1999 454 carb swap. best street carb, 600? 650? 750? CFM.On some newer engines they have gone one step further and used Gasoline Direct Injection (GDI) to inject the gas directly into the...
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75gmck25 replied to the thread Question on upgrading gauges.An original cluster with tach would put a fuel gauge in the lower left and a tach where you now have your fuel gauge. Looks very...
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75gmck25 replied to the thread 1999 454 carb swap. best street carb, 600? 650? 750? CFM.The Edelbrock AVS2 seems to be a reliable solution that will probably only need some minor tweaking with springs and rods if you buy the...
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75gmck25 replied to the thread Fuel return diy.You could also just change your sending unit to one with 3 ports. My ‘75 already had one, and when I replaced it I found they were...
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75gmck25 replied to the thread Fuel cell to stock gauge.GM fuel sending units are 0-90 ohms. If you can get a sending unit with similar specs, it should work fine. Wire from gauge cluster...
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75gmck25 replied to the thread Symptoms of a bad mechanical fuel pump.I think Ricko1996 has the right answer; the filter should really be down in the rubber line that feeds into the fuel pump. However...
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75gmck25 replied to the thread Timing Tab Installation.My Goodwrench 350 crate came with with 2 o’clock position timing tabs for two balancer diameters. They just bolt on using two bolts on...
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75gmck25 replied to the thread Blower motor draining battery.The blower motor relay has a direct (fused) power lead that runs from the junction near the brake booster, across the top of the...
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75gmck25 replied to the thread late GMT400 interior lights wont shut off like a door is open..Sounds like an unintended ground at a light housing may be the culprit. The switched ground for the lights can be confusing if someone...
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75gmck25 replied to the thread late GMT400 interior lights wont shut off like a door is open..Interior lights should have a constant power orange wire running to them, and there is also a white ground wire (but its not grounded)...
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75gmck25 replied to the thread Aux battery for audio.Check the wiring diagram for your truck. My ‘75 Camper Special has a simple (stock) setup with a relay and charge wire for the 2nd...
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75gmck25 replied to the thread LMC C20 Exhaust.I bought mine from Summit Racing, and I think it was made by Flowtech. Everything fit fine, but it was a slow job to get it all lined...
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75gmck25 replied to the thread Help cant get heater box out.It’s been a long time since I replaced mine, but I don’t think the AC box had to come out. However there is one stud hidden by the...
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