5.2L magnum stroker

I have a '94 Dodge Ram 1500 5.2L Magnum that just rolled past 200,000 miles earlier this month and although it still runs well, it is showing its age and the engine feels a little tired. The truck is paid for and insurance is cheap, so instead of buying a new truck, however, I would like to fix this one up. I have an '89 318 out of a B250 van sitting in my garage that I would like to rebuild and swap the top end(heads, intake, etc.) and fuel injection system from my truck onto so that I can put it in the truck. I would like to stroke it during the build to get more cubes (and more torque for towing), but most of the stroker kits I have found include expensive forged pistons and are over $1000. I plan to keep the compression fairly low and this engine will not see much abuse or high rpm use, so cast pistons should be okay and would be prefferable due to my limited budget. Does anyone know of a stroker crank that can be used with stock type cast 318 pistons and rods? Maybe a 360 crank with the mains turned down? Also, does anyone know of a good aftermarket cam kit for this build? Thanks for your advice!