Brand loyal or just like a good vehicle?

I had a 1972 gremlin x with a 258 in line 6, it ran great for a stock 6 cylinder
That 258 is exactly where the 4.0s had their roots. I wanted to find a 258 when I had either my wrangler and/or even my xj Cherokees to pirate the crank out of, to stroke out my 4.0s.