Which headers for a 86' monte/G-body swap
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Launching!
Joined: Oct 2007
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Which headers for a 86' monte/G-body swap Hey guys, i'll be doing a ls1 swap into my 86 monte carlo and i need to know which headers are going to fit the best and also provide great HP/TQ gains. I have John B.'s motor mounts already if that makes any difference. Let me know what you guys think, thanks
On The Tree
Joined: Jan 2007
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flowtech for 98 camaro available at your local autozone for about 300 u.s. clams.beating of passenger side header required.transmission crossmember needs to be modified for clearance and you must beat the floor under your feet for clearance as well.dont you hate it when no one responds to your questions?anyway thats what i did on my 82 cutlass.went from 12.48 to 11.80 from the manifold to header swap alone.
I used pacesetters as well for f-body with no egr, and transdapt motor mounts and a moroso oil pan, all from jegs..
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Launching!
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TECH Apprentice
Joined: Nov 2006
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From: Copenhagen
There are a couple of people on maliburacing using f-body LT´s (think they were pacesetters) with good effect.. but it depends on rearset and height of engine...
this got me thinking that the edelbrock slip-on collector. stepped competition headers for F-body was a hot ticket... but i havent tried it yet..
this got me thinking that the edelbrock slip-on collector. stepped competition headers for F-body was a hot ticket... but i havent tried it yet..
Teching In
Joined: Dec 2005
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From: Southeast Michigan (Detroit area)
I used the John B Mounts and went with the Hooker A-Body LS1 Swap Headers. I heard about them in the G-Body Thread that you can find in this section. The guy there posted pictures as well. He said that they fit perfect except that they are too tight to the floor pan especially on the Driver's side. He said he just heated them up bent them slightly downward. It looked pretty clean.
I just got mine bolted in. The Passenger side bolts in really nice plenty of clearence on the frame but it is a little too close to the floor pan. The Driver side seems to have good frame clearance. However the collector is catching on the floor pan and I am about 1/2" from being able to get the rear header flange bolt into the head.
It definately does not look as though any of the primarys will have to be bent for clearance. Which is something I have seen with some of the other headers used for the G-Body Swap.
I am hoping to pull them back out and angle them down for floor pan clearance in the next week or two. I will let you know how it goes. In the mean time you can search and find the G-Body Thread. There are a lot of pictures of other peoples header choices.
http://www.cardomain.com/ride/2509921
I just got mine bolted in. The Passenger side bolts in really nice plenty of clearence on the frame but it is a little too close to the floor pan. The Driver side seems to have good frame clearance. However the collector is catching on the floor pan and I am about 1/2" from being able to get the rear header flange bolt into the head.
It definately does not look as though any of the primarys will have to be bent for clearance. Which is something I have seen with some of the other headers used for the G-Body Swap.
I am hoping to pull them back out and angle them down for floor pan clearance in the next week or two. I will let you know how it goes. In the mean time you can search and find the G-Body Thread. There are a lot of pictures of other peoples header choices.
http://www.cardomain.com/ride/2509921
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Launching!
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So the A-body swap headers will work better than the F-body headers everyone is talking about. Sorry but it seems that there isnt a simple one sided answer like I was looking for. Any one else have some input...it would be much appreciated
I used the stainless f-body headers on ebay. Driver side had the #5 primary tube moved closer to the cylinder head to clear the steering column shaft. Passenger side had 3 primary tubes re-routed to move them farther back to the collector. Alot of work but the headers shipped to my house was only $200 and I don't have to pay $200 to have them coated. This is in a 1985 cutlass w/ 1" setback motor mounts.
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Joined: Nov 2011
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From: Watertown,MN
I used same headers as roller406, Pacesetter off road long tubes for 98-02 f body, and trans dapt 1" set back motor mount plates with the stock clamshell mounts, just get the plates. One tube on passenger side rubs frame it will fit in there and bolt up but touches frame. Just needs a little clearance however you choose to do that.
check out my thread"6.90's with a junkyard motor"..it should tell you everything you need,hopefully....i just read it and it does'nt...lol...but i'll try to remember some of it off the top of my head...when i put a ls in my 85 regal i used transdapt swap plates with steel moroso 82-92 camaro frame mounts and the taller moroso steel motor mounts,i used the truck oil pan and i used the the jegs stock location double hump trans crossmember...i used a set of pacesetter 98-99 f-body headers...with a turbo 350 trans...heres how i set it in the car,i put the motor and trans in together and bolted the trans down on the crossmember so i could use my stock driveshaft,then i looked where the frame mounts squared up on the engine crossmember(because my g-body had multiple bolt hole locations)i found the location that was very close to aligning up(had to elongate only 1 hole to mount the frame mounts)could'nt use all 4 bolt holes on the frame mounts because 1 of them was hanging off the crossmember alittle...after that it was a cakewalk,the headers fit perfect with no mods what so ever..and i could use my stock driveshaft...this sounds alot harder than it is,but its tried and true...sorry for the long reply also...billy
Last edited by billyflantos; Mar 6, 2012 at 12:33 AM.
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Joined: Feb 2012
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From: miami,FL
check out my thread"6.90's with a junkyard motor"..it should tell you everything you need,hopefully....i just read it and it does'nt...lol...but i'll try to remember some of it off the top of my head...when i put a ls in my 85 regal i used transdapt swap plates with steel moroso 82-92 camaro frame mounts and the taller moroso steel motor mounts,i used the truck oil pan and i used the the jegs stock location double hump trans crossmember...i used a set of pacesetter 98-99 f-body headers...with a turbo 350 trans...heres how i set it in the car,i put the motor and trans in together and bolted the trans down on the crossmember so i could use my stock driveshaft,then i looked where the frame mounts squared up on the engine crossmember(because my g-body had multiple bolt hole locations)i found the location that was very close to aligning up(had to elongate only 1 hole to mount the frame mounts)could'nt use all 4 bolt holes on the frame mounts because 1 of them was hanging off the crossmember alittle...after that it was a cakewalk,the headers fit perfect with no mods what so ever..and i could use my stock driveshaft...this sounds alot harder than it is,but its tried and true...sorry for the long reply also...billy
