Not even close to the grunt of a big block, not even the lowly 383. lol
The worst thing Mopar ever did is to put a low compression 360 in a 5000# truck
Maybe my case is different, mine has longtube headers, 4-bbl intake and recurved distributor but stock 2-bbl cam and it'll do 0-60 in about 8 seconds with 727, 3.54:1 full-floating D60 and 33" all terrains. Very little throttle input needed to get the truck moving. And it weighs about 4400# with me in it. I imagine a bigger engine can still do better but it's way more grunt than a 318, that's the sure.