I’ve had a Mishimoto 3 row in the k5 since 2017. It is the same height and width as the original. I’m thinking it was around $325 when I purchased it. Haven’t really worked the k5 since I replaced the stock TBI 350 with a 400 sbc but as soon as the thermostat opens, the temp drops to 165 and stays just under 180. The Mishi looks well built, and it’s purdy , I would buy it again. Won’t need to though as they carry a lifetime warranty. Currently $429.