The head bolts (or studs if you use them) do not precisely align the heads, so the dowels are needed. You need a precise alignment so your lower intake manifold will seal up properly without warping or leaking. You also may have problems with piston-to-valve clearance. The tolerances on these things are measured in thousandths of an inch, so you want to make absolutely sure that the heads are exactly where they are supposed to be.
Yeah ... What them Guys said
But more importantly :Word:
If you don't use em
The head is gonna fall on the garage floor
when you let go of it to put in the first bolt
Grady
Yeah ... What them Guys said
But more importantly :Word:
If you don't use em
The head is gonna fall on the garage floor
when you let go of it to put in the first bolt
Grady
So true.
Also, many after market heads are bored with 1/2" holes so they can be used on 5.8 blocks. The 5.0 only uses 7/16" bolts or studs which allow way too much slop.
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