The low hp P pump you will be getting can still add some power vs. what you can tweak the VE pump to get. You can probably get 200-250 hp easily with the VE, and another 50-100 easily with the P pump. Not talking about absolute max possible, just what is usually achieved. It is an involved swap. You need to remove the front end of the truck, remove the camshaft, change the gear case, check carefully for clearance to the brake booster and master cylinder, etc. I assume you want the P pump engine as a parts donor, not a complete swap. I would use the camshaft out of the 1994. If so, keep the lifters in order and use them too.