what would be more cost effective / practical

Find another slant. Only "quick" way to do it. I have done plenty of swaps over the years, and I can tell you that the first few cost about 3x what you thought they would - and take a lot longer than you planned.

I have noticed at my local Pic-a-Part that there are still more or less complete slant sixes. I cringe thinking about them going to the smelter, knowing that they are limited supply. Go take a look - in the truck section. That's right, the truck side. Nobody takes much from them, usually an alternator.

B.