454 Vortec Headers

[wheels87k5]

I've have been doing a lot of research on this and from what I've found............Mark IV vs Gen V vs Gen VI heads have the same type of exhaust ports and bolt hole patterns. So that would mean that any 454 header will fit these heads...........as long as the engine is out of the vehicle.

From this thread, https://ck5.com/forums/threads/help-with-my-headers.304075/, is this the vehicle I need to order for to fit my 87 K5? A '91 V3500 crew cab with a 454 & 4L80E? Or is this only for the Suburban in the thread?

Is there a parts list of the different headers that will fit the K5 body styles with a 454?

 

[Smokinthehippies]

Subd for answers.

 

[nvrenuf]

Afaik, any header that'll fit a square body 4wd with a 454 (i.e.; K30, etc) will fit a Blazer. The only differences I know of are 2wd vs 4wd and possible motor mount differences (stock vs aftermarket) slightly changing motor height. For instance, the same Sanderson headers that fit my Blazer perfectly required Mrk5 to lightly trim the frame rail of his crew cab (converted 2wd).

 

[Bent77]

In for learnins