header question
I got a 73 impala :/ Not sure of the frame differences between them. Ask ole boy to come up in here, snap a pic of the fitment of his if he can. I'd like to see if there is any chassis difference between the 71-76 and the 77+ boxes.
In a friends swap we used bbc headers that were 1 7/8 then bought these u bends in 1 3/4 cut them in half at the middle of the u, cut the header tubes below the bends that go to the head flange. Then slid the 1 3/4 tube inside the 1 7/8 tube and rotate the u bend until they match the ls1 head flange. It worked well and he had a set of stepped headers on a budget. Here is an example of the u bends we were using. Hope this helps.
http://www.jegs.com/i/Patriot+Exhaus...H7023/10002/-1
http://www.jegs.com/i/Patriot+Exhaus...H7023/10002/-1
Launching!
Joined: Jan 2009
Posts: 227
Likes: 1
From: CHICAGO IL.
I've been told that 77-96 b-bodies are the same, but i'm willing to bet those same headers would fit your car, in a week i'll be attempting to see if they work myself because i'll be taking the bbc (with headers) outta my 79 and putting it in my cousins 72. In the mean time KCHenry is a member here .....wassup KCHenry reach out if you can
In a friends swap we used bbc headers that were 1 7/8 then bought these u bends in 1 3/4 cut them in half at the middle of the u, cut the header tubes below the bends that go to the head flange. Then slid the 1 3/4 tube inside the 1 7/8 tube and rotate the u bend until they match the ls1 head flange. It worked well and he had a set of stepped headers on a budget. Here is an example of the u bends we were using. Hope this helps.
http://www.jegs.com/i/Patriot+Exhaus...H7023/10002/-1
http://www.jegs.com/i/Patriot+Exhaus...H7023/10002/-1
I've been told that 77-96 b-bodies are the same, but i'm willing to bet those same headers would fit your car, in a week i'll be attempting to see if they work myself because i'll be taking the bbc (with headers) outta my 79 and putting it in my cousins 72. In the mean time KCHenry is a member here .....wassup KCHenry reach out if you can
It was in a rock buggy, but if they make BBC headers for your car I know it will work. Cut the tubes off of the header bolt the Ls1 flange to the head, prop up the header where you want it with blocks of wood, bungee cords or what ever and just connect the dots from there.
Nice! Thats what I was going to do. I mean its only about 1/2" each tube isn't aligned, so it couldn't be THAT difficult to modify them. These "donks" as they're called (71-76 impala/caprice) came with the option of a big block 454, so they should work ok!
post pix of the mods to the bbc headers, when u start working on them
Definately... It will be a while, but I will definately keep you posted. I will use the stock manifolds to get it running and in the car, but after a while, I will take them off and pock the BBC headers up!
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