They're made in many configurations - donuts (fiber and steel), half donut/half flat, donuts with sleeves, flat gaskets, cast *****, bolt down, spring bolts, etc.

It's been 30 some years since I've bent pipe. Back then custom duals ran $200 - $300.

Some manifolds are better than others, typically headers will flow better but not always. Then there's the short (in comparison) life, bolts coming loose, fitment issues, noise, etc. #1 mistake made by many is going too large with pipe diameter. Too big can slow down velocity and scavenging and increases how much atmospheric pressure the engine has to overcome. Most small blocks should stick with 1 7/8 - 2" for duals, 2 1/4" for highly modified.

 

Hey Geoff thats a nice looking set up. Are there any wrecking yards at all over there??

I did mine the poorboy way. I took the exhaust from my donor. It was a long wheel base and wasn't all that old plus It had all the bends I needed to get around the rear end and transmission mount I made. With the extra length I was able to cut it down, move the 22" glass packs further back and behind the cab giving me a little quieter and deeper sound. Used my little wire welder and welded it up and bolted it in. Not the prettiest, shiniest but working great. So if you do have a wrecking yard around you, you could find a wrecked newer model and remove the exhaust and cut it down. Then you may only need the ends going to your manifold bent. Since mine was fitted to and came off the 302 in the donor truck it fitted right up. I did order two newer manifolds. my old ones had a crack and busted ear on the bolt end. Good luck again that a good looking power plant.

mike

 

That was a episode of roadkill with HOT ROD's David Freiburger and Mike Finnegan, it can be viewed on YouTube.

 

Mike, he said in his post #15, no junk yards on the island.

 

found a couple of wrecking yards. ABC 794H Lehua Ave Pearl City, HI 96782
Phone number (808) 456-8114

Harrys Located in the city of Ewa Beach (Hawaii), this wrecking yard is providing car parts to its potential customers. If you want to ask about any spare parts, junk car value estimation, buy or sell scrap cars, please contact via phone or email. Harry`s Used Auto Parts & Tow"

Maui Auto Wrecking
Domestic & Imports 1960-2001 Aftermarket body parts Parts location Rebuilders
City, State: Puunene, Hawaii 96784
Local Phone: 808-871-9400
Fax: 808-871-9401
Email: maw@maui.net


may not have any old old stuff but you never know. May be worth a call

 

Two of the three are on Oahu and one is on Maui. He is on Kauai. He might as well be looking at CA or Texas. It is not like he can drive to them and throw the parts in the trunk for the ride home.

 

well maybe this one will help him dave....

Abes Auto Recyclers Incorporated JunkYard
Hawaii, Kauai, Lihue
3951 Puhi Rd, Lihue, HI (Zipcode: 96766)
Phone: 808 632-0718

 

There you go, maybe he was not aware of that one, good find.

 

I think this might be the video you are thinking about John.


Beat the heck out of the header and it makes more power. No need for smooth curves.

 

That's the one...lol

 

Hey Mike thanks for checking in to all that stuff. Ya that one recycle place in Lihue just scraps stuff and doesn't sell it to individuals. They said my best but was to hit up the tow truck guys before they bring stuff in. so its a long waiting game I gave up on. shipping and travel between islands is pretty pricey too. So this is not the best hobby for an islander but these old trucks are just so much more fun than new stuff.
also ya that video really does show they can take some abuse.