Mild LA 318 Cam Recommendations from Those Who Know

Garrett Ellison said

I vote for 3.21/3.23 gears. If running the regular Edelbrock performer, deep porting it to 360 gasket match is worth some improvement. I would imagine even more so at that altitude. A set of magnum manifolds or shorty headers may work in your engine compartment and definitely be worth some power. At this weight and performance level, I would absolutely go with a Crower 267 HDP. Very smooth and drivable with a nice sound at idle but plenty of torque for 31 to 32 inch tires with 3.21 gears.
Mopar Hydraulic Flat Tappet Camshaft

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Magnum exhaust manifolds are out since they didn't exist in the 60s, but shorty headers are an option. Fooling with headers is likely not worth the money and hassle of getting them to fit and work with the headpipes since the build is already leaving performance on the table by design.

As far as porting the 318 intake runners to 360, most of the garage porting threads I've read on FABO advise against using 360 intake runners on 318 heads because the mismatched runners will create a disruptive bottleneck and type of Venturi effect when entering the 318 head runners. Wouldn't it be better to keep the velocity consistent by running 318 runners from the plenum to valve pockets, port matching to a 318 gasket of course?

The Crower 267:
218/222, .474/.485, 112SLA.
Crower recommends a higher-than-stock stall converter and 9.5 static CR, so I'd be concerned with over-camming with my 8.3 CR. Have you used this cam on an 8.5ish static CR 318 with success?