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Fuel Pump Bolts
So I bought a fuel pump for my 72 Skylark with the Buick 350. Someone had already removed the mounting bolts so they are missing. I have been checking websites like Summit and ARP but haven't been able to find Buick specific bolts. Does anyone know the thread/pitch/length of these bolts? Do the Chevy 350's use the same bolts as the Buick?
Thanks
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Looks like OPG has them and they are the same part numbers as the ones from Summit for the SB and BB Chevys. I've got a buddy that's about to order from Summit and I don't wanna pay double the price of some bolts with the shipping costs so I was trying to have him put it in as an add on to his order.
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Scratch that. Used the part numbers from OPG and ordered from Summit (had to get some parts for my subaru anyway). Bolts are too big. Does anyone know what length/pitch/thread I need for the fuel pump? Just gonna go to the hardware store and get them if I can.
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i should think www.TAPerformance.com would be able to help
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Buick Master Parts book shows bolts were not special and did not have part numbers. One exploded view of the 1970-73 455 Buick big block shows bolts are 5/16-18 x 1-1/8. Should be the same on the 350. Posts on another website indicate these bolts had serrations under the head to act as a lock washer.
Bolts with lengths by 1/8" steps are sometimes hard to find. A 1-1/4 with separate lockwasher should work as long a bit of extra length doesn't make it bottom out or interfere with other parts at the tail end.
Specified torque -20 ft lb- is lighter than many Chevy specs due to smaller diameter and aluminum front cover. Grade 8 would be preferred, but grade 5 should be OK for this application.
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you can also shorten a bolt to custom length by threading a matching nut onto it, cutting the bolt to length, grinding a bevel onto the fresh cut ( easiest with a bench grinder ) and then taking the nut off.
the nut will act as a die to straighten the threads out. or you can use a real die.
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Thanks guys, I purchased a couple different size bolts to see what will work. Haven't had a chance to start testing yet because the weather took a dive on me the day after I got the bolts. If the sizes I got don't work out, I will have to give Bob's advice a shot. Thanks again