5.2 Magnum into a '72 Scamp-tips?

Hello everyone, I've been looking for answers as to which oil pan to use on a '98 5.2 I received for a favor. I'm prepping it to drop into my '72 Scamp to replace the tired 318 2 bbl currently residing in the bay and starting to make death noises. I'm not looking to turn this thing into a firebreather...just wanna enjoy the car without having to worry about the engine locking up

I wound up on this website before while trying to find out for sure what pan to use for this endeavor only to find out the info I picked up in about three different "Google" searches wasn't accurate. I read several threads here and elsewhere stating the 5.2 and 5.9 will both take the LA360 pan w/360 pan gasket when swapping to A bodies. So, an order to Jeg's was dispatched and a few days later, the friendly UPS guy dropped off a shiny new irridited pan and gasket. I found out shortly thereafter the pan and gasket combo was wrong-GIGANTIC gap between pan rail and rear main cap. No big deal, I figured. I picked up a pan gasket for a 5.2 Magnum, '98 Dakota (donor vehicle) and tried that. Again, no joy-the Magnum pan gasket was indeed thicker, but not enough to fill the gap...ok, so what am I missing here? Did I purchase the wrong pan? Wrong gasket? Can I just use my old pan? I'm sorry to say I don't have any pictures available right now...

Someone please assist before I waste any more money buying the wrong parts.

Among the other things I plan to use, I know I need to use my old timing cover, and fuel pump arrangement. I already purchased the Hughes cam snout extension doohickey, but I am slightly confused about which timing set to use, or if there's a difference between LA and Magnum timing sets.

I also noticed some folks chose to run the serpentine setup-is there anything special I'd need to run this in my car with the original timing cover/water pump setup? Other parts interchanges? Any suggestions or help is greatly appreciated.