75gmck25's latest activity
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75gmck25 replied to the thread Small Block choices: A feller has too many.I used Mahle .026 head gaskets with my crate 350 and 64cc Blueprint heads, to try and make up for the low compression of the stock... -
75gmck25 replied to the thread In need of a space to work for a short time.I appreciate your motivation, but that’s a long distance and lots of gas for a 4WD squarebody . Why don’t you let the military ship...
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75gmck25 replied to the thread 1973-1980 Tailgate Trim.I have the original ‘75 tailgate with a narrow band and centered GMC, and I have a complete 80’s bed on the truck, with a wide band that...
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75gmck25 replied to the thread Gas tank pressure problem.Go back to basics and check your sending unit and fuel pump fittings. The optimum solution for fuel flow and venting is a three port...
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75gmck25 replied to the thread Another Blower fan switch/relay/resistor thread.On my ‘75 with A/C the high speed relay and the resistors are mounted on the big evaporator plenum under the hood. I’m not sure where...
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75gmck25 replied to the thread Tilt Steering Column.Has the ‘75 transmission been swapped with something newer? There was no 4 speed auto in ‘75. I’m also confused about your mention of...
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75gmck25 replied to the thread Edelbrock 750 cfm or 600 cfm carburetor for 454 stock engine..As already mentioned, first make a couple of checks of the existing setup. - Is it a 3 port fuel pump with a return to the gas tank...
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75gmck25 replied to the thread in tank fuel pump with Edelbrock carb.Does your block have the option of installing a stock mechanical pump? They are really cheap, and generally reliable once you find a...
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75gmck25 replied to the thread Storage tray.Why is the top edge of the back piece so uneven? Is there a piece of trim that goes over it to hide the edge? My truck has holes in...
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75gmck25 replied to the thread Which A/C compressor do I have?.I had to do some more research, but then determined there is an A6 (which my '75 had), a DA6 (used in late 80's), and then a later HR6...
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75gmck25 replied to the thread Which A/C compressor do I have?.The one in the picture looks like an A6, but it’s the strangest set of mounting brackets I’ve seen. An A6 is usually mounted much...
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75gmck25 replied to the thread Inconsistent fuel pressure.I also recommend you find a good new or used large cap HEI distributor (coil is in the cap) and make the swap. There is no reason to...
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75gmck25 replied to the thread Ignition Timing for First-Generation GM V-8 Engines.If you want to measure timing beyond what shows on the pointer, you can install a timing tape on the balancer, which will have degree...
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75gmck25 replied to the thread Battery / charging isolator..The original setup on my '75 Camper Special had a relay (silver body, similar looking to the blower relay on the A/C plenum) mounted on...
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75gmck25 replied to the thread Vortec heads.I used these heads on my SBC, and they are a complete assembled head. They don’t claim to be a Vortec clone, but have similar...
