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Author
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Topic: 302" -351" headbolt washers
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Bob Hopkins
Gearhead Posts: 254
From: BRIDGEPORT NJ USA
Registered: Jan 2001
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posted 12-03-2003 12:57 PM
   
to install 351" heads on 289" you need adpater washers who where do you git them from nowadays?
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bluestreek
Gearhead Posts: 1460
From: Athens,GA
Registered: Jul 2001
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posted 12-03-2003 01:18 PM
There are 3 ways to do this.
You can use standard 7/16 bolts with reducer bushings like these: http://store.summitracing.com/partdetail.asp?part=TFS%2D51400419You can buy new ARP stepped bolts like these: http://store.summitracing.com/partdetail.asp?part=ARP%2D254%2D3708 Or you can drill and tap the existing block holes for the standard 1/2" Windsor bolts. ------------------
1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank, rods and girdle, TFS alum. heads, Stealth 8020 intake, Xtreme 268 Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi.
11.86 @ 116 mph (7.62 @ 93 mph)daily driver!
DanH
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Bob Hopkins
Gearhead Posts: 254
From: BRIDGEPORT NJ USA
Registered: Jan 2001
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posted 12-03-2003 02:20 PM
hey thanks I appricate the fast reply
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V-8
Gearhead Posts: 198
From: Turkey/Istanbul
Registered: Dec 2003
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posted 12-03-2003 04:28 PM
i think the best one is:
"drill and tap the existing block holes for the standard 1/2" Windsor bolts."as bluestreek says.
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JCQuinn@work
Gearhead Posts: 498
From: Lakewood, CO, USA
Registered: Jun 2001
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posted 12-03-2003 04:43 PM
I can only pass on what I have been told as I heve never done this. For what it is worth I was told that drilling a 302 block to 1/2" bolt holes and tapping it will weaken the block.I don't remember who told me this, I think I have heard it more than once. But I do remember that I respected the opinion of the person(s) who told me. John
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V-8
Gearhead Posts: 198
From: Turkey/Istanbul
Registered: Dec 2003
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posted 12-03-2003 05:55 PM
but it is a trick made for strongless.for high rpm use and nos or turbo boosts
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Rory McNeil
Gearhead Posts: 1288
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 12-04-2003 01:46 AM
When I installed the 69 351W heads on my street Fairmonts 302, I simply bought a set of Mr. Gasket head bolt washers for a SB Chevy. Thats over 6 years ago, with no problems. Plus, since the Chev uses 18 head bolts per side, you have almost enough washers left over to do a second engine!------------------
78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA Stocker 302 5speed. 13.04@101mph
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd
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smblk t-bolt
Journeyman Posts: 88
From: port alberni BC Canada
Registered: Apr 2002
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posted 12-04-2003 02:43 AM
the first time I did the head swap I went to the machine shop and got some hardend washers to use with the stock 289 bolts and ran it for around 8 or 9 years with no prob's. Then I learned that "marine" 302's had 351w heads on them from the factory using bolts with integeral washers. Swapped a set of those in with the next rebuild and have been running that setup with no probs for 6 more years.I've run 351w heads on my 289 for about 15 years with no problems using stock 7/16 bolts. my compression is around 11-1 with trw pop-ups. I would think the dowels locate the head good enough that if properly torqued (and your not going blower/nitrous) that stock bolts would be fine for the street
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