I picked up this 327 for my 46' International Harvester K3 Longbed. Truck is down to the frame. Jaguar XJ6 front suspension installed. The Jag rear will be someday, but for now I am gonna run a simple parallel leaf setup with a Ford Explorer 8.8.
So to help with my questions, it will run the 327 with a 700R4 overdrive. The 8.8 has 3.73 gears and Trac-Loc. So here is the info on the motor I picked up. It was an impulse buy, got a pretty good deal on it. Hoped it would be fine how it was built but the more I have asked questions about it, the more I'm told the compression will be too high for pump gas. I want this to be my everyday driver and would like to be able to run 87 octane. Already have to run 91 in my C5 Vette. Gas aint cheap.
Here is the info on the motor:

Rebuilt 63 Corvette Engine (casting #s match but who knows what it really came out of)

Block was bored to .060” over with new TRW pop up pistons with molly rings.
Double roller timing chain turns a new Crane Fireball cam
with advertised duration of 286°.
Block also has new cam bearings and freeze plugs.
Crank was turned to .020”-.020” with new Clevite rod and main bearings.
New high volume oil pump with hypo intermediate shaft.
Heads are angle plug Fuely Double hump with stainless 2.02” intakes and 1.60” exvalves. (dealer, over the counter only heads)
Heads are street ported (reworked bowls and gasket matched). Heads have screw in studs with CompCam guide plates with Hypo 3/8” pushrods.
Heads just redone with new guide bushings, perfect circle seals and perfect 3 angle valve job with LTI springs.
Valve covers are genuine Corvette highly polished. Intake is Offenhauser 360° equa-flow manifold that is gasket matched to heads.

Head casting #3991492 2.02/1.60 64cc Angle plug

I found some Stainless block hugger headers to clear the angle plug heads. Just picked up a new HEI distributor. And am replacing the Offy intake with a 69' Camaro Z28 intake (3932472).
600cfm carb?
So, in reading what the motor was built with, what direction should I go? New flat top pistons?
I have specs on the cam as it was new and got the box it was in with all the info. It's a vintage Crane unit. I'm sure there are better modern street cams that would be a better choice than this one. I would like to leave the heads alone if possible.

Any thoughts?