I just changed out six's in my 79 Aspen and reused my Super Six intake/exhaust manifold as the motor I transplanted was a '80 1 barrel. I used a FelPro gasket. Worked great, no more exhaust leaks, great vacuum. I torqued them from the inside out, back and forth side to side. Torqued them to 10 foot pounds. Do I have to retorque with this style gasket or am I good?

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I'd say it wouldn't hurt to verify that the nuts are still at 10 ft-lbs. Just check 'em in the same method/order you'd torque them in case some have loosened.

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'74 Duster w/ HEI ignition, beat to snot suspension, A904, 8.25" 3.55 SG rear, still being tuned up and gets 17 MPG

Know how they always build a better idiot? That's me

You can go up to 12ft-lbs on the manifolds to head bolts.