TrunkMatt Posted October 21, 2011 Posted October 21, 2011 Need some help... we are having trouble sourcing block-hugger headers that fit the Square Exhaust ports on the Alum Heads of my 383 build: We've tried about 6 different sets of standard / oval & D shaped... nothing fits quite right... Can't really find SQUARE in the shops here. I am afraid of ordering online as they are hard to return if they don't fit right. If anyone has any advice to a Block Hugger, ceramic coated header that matches square port aluminum heads on a small bock --- I'd love to hear it. Quote
Mike 57 Posted October 21, 2011 Posted October 21, 2011 you can always get a set of uncoated headers that fit and change the flanges to something like these header flanges. Lots of work! What heads are those? What is the dimension of the port? Quote
TrunkMatt Posted October 21, 2011 Author Posted October 21, 2011 Ya know... I really don't know where they are sourced from. I want to say they were custom milled in the machine-shop here in Portland (Portland Engine Works). I'll find out tomorrow. They look like the SSRE / Patriot square heads though -- but the surface is much flatter where the flanges mount. Quote
wallaby Posted October 21, 2011 Posted October 21, 2011 Maybe these guys can help? I see from their website that they can make flamges from a rubbing of your port surfaces... http://www.spdexhaust.com/Header-FlangesB.html Quote
FastClass Posted October 21, 2011 Posted October 21, 2011 A google search for square port big block headers produces a bunch of info and shops. Totally understand your reluctance to order sight unseen online. Maybe the search will lead to a shop near you. Edit; Not sure where I got BB from. Quote
TrunkMatt Posted October 22, 2011 Author Posted October 22, 2011 Well - the Hedman 68863's ended up being a perfect fit: http://www.summitracing.com/parts/HED-68863/ Now I just need to source 1 inch locking fasteners from Stage 8... the 3/4 are just a bit on the short side as the flanges on these hedmans are super-thick (really nice). I am impressed with the Hedman quality... Quote
Mo's70MCs Posted October 22, 2011 Posted October 22, 2011 Wait a minute.. How are those square ports? Quote
wallaby Posted October 22, 2011 Posted October 22, 2011 Those are less square than Indianapolis raceway. Quote
TrunkMatt Posted October 22, 2011 Author Posted October 22, 2011 Wait a minute.. How are those square ports? Correct - They are OVAL... after talking to some exhaust shops... if they are not round and not D -- they are OVAL (even if they are square). They actually fit OUTSIDE of the ports which is what I need.... all the other D shaped or Rounds would have cut the corders / and thus leaked / restricted flow. These, being slightly bigger (taller) allow a smooth unobstructed flow. Quote
KWick_70MC Posted October 22, 2011 Posted October 22, 2011 Leave it to Matt.. square peg.. round hole.. Quote
TrunkMatt Posted October 22, 2011 Author Posted October 22, 2011 Leave it to Matt.. square peg.. round hole.. You know me so well already!!! Hey -- btw I may be up in your neck of the woods regularly. Potentially starting a new thing with that tech company everyone knows up there. Quote
KWick_70MC Posted October 24, 2011 Posted October 24, 2011 US Navy?? Oh the "OTHER" side of the water.. Do you have an APP for that?? Let me know when your up this wa.. we can do a lunch or something.. Quote
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