The bolts themselves are common and can be gotten in most hardware stores. Get a good grade,not the cheapies. I think they come in two lengths, I'll check.
The funny long "mushroom washers" that slide onto the bolts are specific to old engines. They are easy to find on old junkyard motors and maybe a fellow stovebolter on this forum has an extra one.
They also look like a "cavitelli noodle" or a long "sea-shell".
I have seen restored trucks with the bogus "round flat washers" used instead of the proper "mushroom"; the mushroom washers provide the proper side "lips" to hold the manifolds tight when the manifolds are torqued properly. They keep the manifolds from leaking and warping!
Finally, I clean the old bolt threads with a wire wheel and then use "Never-Sieze" lube before properly torqueing. These bolts get hot and gaul into the head, best to have Never-Seize on them to re-torque if needed.
Here is a pic of my updraft 1952 head&manifold. The bolts may be too small to see.
Chevy/GM offically calls the bolt with "mushroom" washer a....
Manifold Clamp Bolt [img]
http://wsphotofews.excite.com/039/gK/T7/Tb/Wp75280.jpg[/img]
[ 12-28-2001: Message edited by: lil' johnny ]
