Chillin Dylan
OBS Enthusiast
Hey dudes. I’m in the middle of swapping a Gen VI 454 into my 95 454 2500 NV4500 4x4. The new engine will have no EGR or anything like that. One 02 sensor for the Holley sniper. I’m waiting on the cam and valve springs since it’s apparently on back order for another month. I’m considering going with headers while I’ve got everything apart. I don’t want to spend 500+ on headers though. I see 454 headers on JEGS for less than 200 bucks that are advertised to fit a square body 4x4 big block truck. I know the bolt pattern is the same. I’m not concerned about the port, I’ll port them to match if they don’t. I just want to know if they fit the chassis. Given how much cheaper they are than GMT400 headers, I’m sure somebody has tried it. Can anybody weigh in here? Thanks
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