A 1000 hp pump gas engine is an R&D project, especially a Mopar wedge one. You might be able to find a few engine builders who build BB Chevy based pump gas engines that make 1000 hp, but I doubt that there are very many (if any) Mopar (NA) wedge engines that make 1000 hp on pump gas.

I wouldn't attempt to build a 1000 hp pump gas Mopar wedge myself and I've been designing and building Mopar bb wedge motors for over 30 years. I'm surprised it only cost you $22K. My 514 dyno mule makes 930 hp with 15:1 compression and cost more than $25K. Making more horsepower with less compression on a smaller budget is hard to imagine.

If someone asked me to build them a NA Mopar wedge that made 1000 hp on pump gas I'd ask them for $30K down payment and tell them to call back in a year to see how close I was. I'm not sure it is even possible since you would need something on the order of 600 inches that make 1.7 hp/inch. It isn't easy to make 1.7 hp/inch on pump gas in a big engine. 1.7 hp/inch for a 440 is 750 hp. Not very many 750 hp 440 pump gas engines running around.

I'm building a pump gas 470 engine at the moment using some really good parts and I'm shooting for 675 hp or 1.44 hp/inch. I just can't see a reasonable way to get to 1.7 hp/inch with pump gas.