Trick Turbo is a reputable supplier of kits; they have a budget twin kit for around $5k and a better one for around $7k. Anything less than that and you'll probably end up sucking shredded parts into your intake and ruining your engine. But then you might get lucky and just end up with leaks and failures. Here's a link to one of their twin builds on pt.net.
https://www.performancetrucks.net/f...st-performance-21/few-pics-twin-build-551262/
https://www.performancetrucks.net/f...st-performance-21/few-pics-twin-build-551262/