gbledsoe3

Part #: 6112G - $329.95 Includes MLS Head Gaskets

Part #: 5981MRG - $191.95 Standdard Ultra-Seal Head Gasket

cutlassefi

They've recently changed the front cover seal though and it's wrong.

gbledsoe3

So, now what? Buy the cheaper Mr. Gasket set, source Cometic MLS head gaskets and source the front cover seal/gasket from somewhere else? I see Fusick has a front cover set for $29.50 which includes the front cover, water pump, damper seal, oil pan seal and fuel pump gasket.

BTW- By my calculations, a Cometic with .027" compressed thickness (4.200" bore) will figure to 10.00-to-1 CR.

NOTE: I need to cc a cylinder heard to verify the 77cc value.

cutlassefi

If you're .008 in the hole with a 77cc chamber then you'll have at least 10.0:1 even with a .038 thick gasket. The dish on those pistons is 14.5, not 18.
And just get the Ultra seal kit and buy a front cover seal for $5.00. I just mentioned it so you knew when you got it that it's been like that.

gbledsoe3

The Ultra-Seal kit with the MLS head gaskets? (aka $330)

cutlassefi

No, the one I did in bold.

olds 307 and 403

Thank makes sense, sure it saved them 5 cents. The conversion set is a cheap addition and has the right front seal. https://www.summitracing.com/parts/FEL-CS8171-2