Stepped Head Bolt Bushings/Washers 1/2 to 7/16 - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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Old 10-05-2003, 01:30 PM   #1 (permalink)
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Stepped Head Bolt Bushings/Washers 1/2 to 7/16

When using 351W or aftermarket heads with 1/2inch head bolt holes on a 289/302 with 7/16 bolts is it really necessary to use stepped washers? If so,who makes a low cost version?Most of the ones I see are kinda pricey.
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Old 10-05-2003, 02:24 PM   #2 (permalink)
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Stepped Head Bolt Bushings/Washers 1/2 to 7/16

It's not "essential", but is really worth the risk of movment and a leaking head gasket? Edelbrock has em and as I recall, they're not too expensive.
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Old 10-05-2003, 07:15 PM   #3 (permalink)
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Stepped Head Bolt Bushings/Washers 1/2 to 7/16

I've done it both ways, with and without the bushings. I feel safer with them installed, however. ARP makes them, actually they make them for Edelbrock (or used to anyway), but they're about the same price from both places. I ended up using an ARP head bolt kit which came with the bushings. I think it was around $105 or thereabouts.
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Old 10-05-2003, 08:40 PM   #4 (permalink)
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Stepped Head Bolt Bushings/Washers 1/2 to 7/16

Thanks for the replys. The motor I'm freshing up has had no problems for years running Windsor Srs with 1/2 bolt holes and ARP 7/16 bolts but I think I'll use the stepped washers this time just for peace of mind.
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Old 10-06-2003, 09:34 AM   #5 (permalink)
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Stepped Head Bolt Bushings/Washers 1/2 to 7/16

You could buy a set of head bolts from Ford Racing....about $70.00 for doing this.

http://www.oemfordparts.com/PartDeta...bCategoryID=38
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Old 10-06-2003, 03:13 PM   #6 (permalink)
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Stepped Head Bolt Bushings/Washers 1/2 to 7/16

hi if i were to change my 302 to 351 heads, would the 302 headers matchup in the same place?
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Old 10-06-2003, 05:15 PM   #7 (permalink)
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Stepped Head Bolt Bushings/Washers 1/2 to 7/16

yep
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Old 10-06-2003, 05:29 PM   #8 (permalink)
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Stepped Head Bolt Bushings/Washers 1/2 to 7/16

Thank for the link, Larry (Just Strokin).The Ford Racing bolts/bushings look to be ARP stuff at a cheaper price.Good thing my Morris doesn't require smog stuff as according to the write up on the bolts they aren't legal on "pollution controlled motor vehicles".

I like your Fairlane by the way. It doesn't look like a rust bucket anymore. Is it running yet?
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