Gibson C10 swap headers dont fit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**juddss** · 03-07-2017, 04:59 PM

I am installing a 6.0 supercharged engine into my 71 C20 and have Gibson ls swap headers. I just installed my engine and they wont fit. They are hitting my Cpp engine stands. I also have Cpp engine sliding motor mounts. Any one else run into this. Its like my engine has to go up. Or get different headers.

87chevy.com · 03-08-2017, 02:21 PM

Probably get a quick answer from Gibson themselves.. they may have made those headers to work with one specific mount

**juddss** · 03-09-2017, 02:10 PM

they said they used transdapt mounts but no part numbers for me. Awesome looking headers but they were not very helpful in my situation. They said I may have to bring the motor up but I think im going to cut the engine stands and reshape them.

Nickelndime · 03-09-2017, 03:58 PM

This isnt good to hear. I'm getting ready to install my ls engine and have the same headers with cpp engine stands. Im using universal ls adapter plates with polyurethane mounts. Likely to run into this same problem

**juddss** · 04-03-2017, 05:24 PM

Quote:

Originally Posted by Nickelndime

This isnt good to hear. I'm getting ready to install my ls engine and have the same headers with cpp engine stands. Im using universal ls adapter plates with polyurethane mounts. Likely to run into this same problem

These mounts should make things a lot easier. They are way thicker then the CPP ones.
https://www.summitracing.com/parts/p...AN4aAhyD8P8HAQ

**PGSigns** · 03-13-2017, 08:04 AM

I think there was a thread on this once before. The answer was to trim the mounts. Seems the CPP mounts hit more than one brand header.
Jimmy

**juddss** · 04-03-2017, 05:26 PM

That's what this guy did to make them fit. These are the uncoated Gibson headers.

Nickelndime · 04-03-2017, 07:45 PM

I ended up trimming the engine stand like you have pictured. The passenger side had the most interference on mine.

03-07-2017, 04:59 PM	#1
juddss Senior Member Join Date: Jul 2015 Location: Syracuse NY Posts: 206	Gibson C10 swap headers dont fit I am installing a 6.0 supercharged engine into my 71 C20 and have Gibson ls swap headers. I just installed my engine and they wont fit. They are hitting my Cpp engine stands. I also have Cpp engine sliding motor mounts. Any one else run into this. Its like my engine has to go up. Or get different headers. Attached Images

03-08-2017, 02:21 PM	#2
87chevy.com BMW & ASE Master Certified Join Date: Feb 2004 Location: Houston, Texas Posts: 1,266	Re: Gibson C10 swap headers dont fit Probably get a quick answer from Gibson themselves.. they may have made those headers to work with one specific mount __________________ 1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress

03-09-2017, 02:10 PM	#3
juddss Senior Member Join Date: Jul 2015 Location: Syracuse NY Posts: 206	Re: Gibson C10 swap headers dont fit they said they used transdapt mounts but no part numbers for me. Awesome looking headers but they were not very helpful in my situation. They said I may have to bring the motor up but I think im going to cut the engine stands and reshape them.

03-09-2017, 03:58 PM	#4
Nickelndime Registered User Join Date: Nov 2016 Location: NC Posts: 9	Re: Gibson C10 swap headers dont fit This isnt good to hear. I'm getting ready to install my ls engine and have the same headers with cpp engine stands. Im using universal ls adapter plates with polyurethane mounts. Likely to run into this same problem

03-13-2017, 08:04 AM	#6
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Gibson C10 swap headers dont fit I think there was a thread on this once before. The answer was to trim the mounts. Seems the CPP mounts hit more than one brand header. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

04-03-2017, 05:26 PM	#7
juddss Senior Member Join Date: Jul 2015 Location: Syracuse NY Posts: 206	Re: Gibson C10 swap headers dont fit That's what this guy did to make them fit. These are the uncoated Gibson headers. Attached Images

04-03-2017, 07:45 PM	#8
Nickelndime Registered User Join Date: Nov 2016 Location: NC Posts: 9	Re: Gibson C10 swap headers dont fit I ended up trimming the engine stand like you have pictured. The passenger side had the most interference on mine.

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