cuz it's a Chevy Mark
hahaha, I resorted to a Chevy in mine, but having a full tube chassis/custom firewall car now I would have done the Ford.
First off, the block is longer overall for a 302 v. SBC (2" longer IIRC).
That said, for the Ford, you would need to figure out how to get the water in and out of the big arse timing chain cover assembly. Because the holes aren't round makes it tough. It could be easily done switching over to a belt drive like a Danny Bee which will have round inlet holes that would be easy to tap for fittings to attach water lines to.
Distributor-wise, would need to go crank triggered and run a gutted dist housing just to drive the oil pump, or go external oil pump (which would take too much room on the front of the crank to install the drive components). I am full dry sump on mine now, so again a Ford would have been an easier choice had I known where I would end up.
In any event, going to a Danny Bee and crank trigger ain't cheap and the Chebby is more of a slam dunk, so that is why it is so common. I did see a SBF in one at Otto's one time tho' and it had a stock distributor and so forth, but they allowed ingress into the interior compartment (boxed in the dist) and just didn't have a back pad IIRC.