Peak America I believe.
Pick your poison to spend your 200-500k with Hennessey, TRX Mammoth 900, 1000, SUV or 6x6.
http://hennesseyperformance.com/vehi.../ram-1500-trx/
The Hellcat is enough for the Mammoth 900, 1000 and SUV, and more than a C8 can handle too it seems.
https://youtu.be/Smpq7FQCQSU
The 6x6 is not going with the Hellcat but rather the Hellephant and 1200 hp, because well why not.