Charlie:

You're right, the bolts in the pic are 1/2".  But I blew two head gaskets at Columbus that weekend.  I now run 1/2" ARP studs, so far they are holding, but I have backed the boost off a tad.  Also added a post at the spot that kept blowing.

John - "The Hoosier Hurricane"

Correct me if I'm wrong, but I do believe that the Hoosier Hurricane uses Grade 8 bolts. They are 1/2", though. See them just behind the head?







ARP is great, but for the budget minded, I think grade 8 will do the trick.


Lawrenceville, GA

You guys have convinced me...I'll go with ARP main and head bolts.

Rono

  Ron Lane,  Meridian, ID

Rono, If you are going to bolt on a supercharger, don't take any short cuts on bolts! I used a.r.p. in my lincoln y-block and i am only running 6# of boost.

  JUST A MIDNIGHT CRUISE DOWN THUNDER ROAD!!! TOM DRUMMOND MIDWEST DIRECTOR 57 FORD INTERNATIONAL

2 x ARP 653-2250

2 x ARP 653-4500



Those three upper center bolts are a little bit (~2mm) too long, but I got 1,3mm chopped heads.


Hyvinkää, FI

Guys;

Thanks for the advice and info...I'll reconsider things.

Rono

  Ron Lane,  Meridian, ID

Awesome link Charlie. I see they have a warehouse in Santa Fe Spring, CA ~20 mi East of me.



Thanks

"The Master Cylinder"

Enjoying life at the beach in SOCAL

Personally I would use ARP bolts instead of grade 8 bolts. If you check the ARP site you will be very surprised at the substantial difference in tensile strength between the ARP bolts and grade 8 bolts.
http://arp-bolts.com/  
Mummert sells them in packages for 292 or 312 engines. I have seen too many head gaskets blown  especially diesel engines from a lack of quality head bolts.

marv

www.mcmaster.com



Gr8 7/16-14, 4 1/4", 91257A686   $8.67/pack of 5


Lawrenceville, GA

Rono:

The 3" main bolts will be OK, but check that the rear cap is not shorter than the other 4 to clear the seal retainer.  If the cap is shorter, the 3" bolt will probably be too long.  For the head bolts, I would screw the 4.5 bolts in the block by hand and measure them to be sure they are not too long.  I'm guessing they will be too long. 

John - "The Hoosier Hurricane"