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Greg West · 07-05-2017, 08:29 PM

Something else to consider on a SBC is the size of the dowel pins. The OE dowel pins are .309" diameter. If .3125" (5/16") pins are used the head can bind on the pins. This will prevent the head from clamping properly to the block in the lower corners. Several companies sell SB dowel pins that are actually 5/16" roll pins.

07-05-2017, 08:29 PM	#2
Greg West Junior Member Join Date: Jul 2016 Posts: 63 Likes: 26 Liked 52 Times in 22 Posts	Re: cometic head gaskets Something else to consider on a SBC is the size of the dowel pins. The OE dowel pins are .309" diameter. If .3125" (5/16") pins are used the head can bind on the pins. This will prevent the head from clamping properly to the block in the lower corners. Several companies sell SB dowel pins that are actually 5/16" roll pins.