Making power out of the 318

if you're going magnum...

start here: Magnum Swap -your source for Mopar engine swap information.

get these:
https://www.amazon.com/Modify-Mopar-Magnum-V-8HP1473-Step-ebook/dp/B002SV3768?tag=fabo03-20
Mopar Performance Magnum Engines

https://www.amazon.com/Rebuild-Mopar-Magnum-Engines-HP1431/dp/1557884315?tag=fabo03-20
then take a deep dive here:
https://www.forabodiesonly.com/mopar/forums/magnum-engine-swaps.131/