390 with 428 CJ exhaust 66 Cyclone

390 & up cid Monster Motors
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ENOLCYC
Posts: 79
Joined: Mon Feb 24, 2014 3:07 pm
Location: SF Bay Area

390 with 428 CJ exhaust 66 Cyclone

Post by ENOLCYC »

Just wondering will the 428 CJ exhaust manifolds work instead of the 390 GT exhaust manifolds in a 66 Cyclone.

I'm fairly certain they will just wondering if anyone has done it.

TIA
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popscomet
Posts: 9689
Joined: Sat Jan 01, 2011 11:19 pm
Location: Jacksonville, Arkansas

Re: 390 with 428 CJ exhaust 66 Cyclone

Post by popscomet »

bolt pattern the same?/………..pop
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pop/glenda

Lip Ripper
Posts: 1870
Joined: Wed Jun 06, 2012 6:47 am
Location: Lake Placid, Florida

Re: 390 with 428 CJ exhaust 66 Cyclone

Post by Lip Ripper »

What Pop asked. The front and rear bolts on the GT heads are about 3/8" lower than the rest across the top. I don't think CJ heads are.

And do yourself a favor. Sell the manifolds and pay Stan at FPA for his custom Tri-wye headers. The best $900 you'll spend on your car.

Stacey
66 Cyclone GT; 245/60R15's on 15x8's and 215/70R15's on 15x7 Magnum's.
There's nothing like the sound of a pushrod V8 singing at the top of her lung's.

ENOLCYC
Posts: 79
Joined: Mon Feb 24, 2014 3:07 pm
Location: SF Bay Area

Re: 390 with 428 CJ exhaust 66 Cyclone

Post by ENOLCYC »

Thanks for the info, I always assumed the CJ exhaust would work on the GT or Edelbrock heads. Picked the up years ago just never did the research.

Sorry it took me a bit to reply as I've just found a matching 66 Cyclone convertible, but in emberglow, may add to my fleet. Tried to add pic but too big!!

Kicker is that its only 2 miles from me
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popscomet
Posts: 9689
Joined: Sat Jan 01, 2011 11:19 pm
Location: Jacksonville, Arkansas

Re: 390 with 428 CJ exhaust 66 Cyclone

Post by popscomet »

sounds to me you got more important things on your mind then an ill fitten exhaust manifold,,later pop
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pop/glenda

vicegrip
Posts: 402
Joined: Tue Jan 08, 2013 12:12 pm

Re: 390 with 428 CJ exhaust 66 Cyclone

Post by vicegrip »

ENOLCYC wrote:Just wondering will the 428 CJ exhaust manifolds work instead of the 390 GT exhaust manifolds in a 66 Cyclone.

I'm fairly certain they will just wondering if anyone has done it.

TIA
There was a 66 GT that came up on eBay that looked promising. No motor or trans but said it had the orig glass hood,very little rust. Was getting ready to bid as it opened for 4 grand but the listing ended as fast as it started,probably sold off line.

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fryedaddy
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Joined: Mon Nov 03, 2014 12:40 am
Location: east tn

Re: 390 with 428 CJ exhaust 66 Cyclone

Post by fryedaddy »

im not sure, i have forgotten alot over the years but the reason the gt heads and cj heads have 14 and 16 bolt holes is so they will work with either bolt pattern side to side or top and bottom,those cj manifolds may fit the side to side bolt pattern but like Stacey said the front and back top bolts are lowered on gt heads.you dont have to use all 14 or 16 bolts.top and bottom will work and side to side will work.i use to try and get all 16 bolts in my cj heads but with a good set of headers or manifolds either pattern is ok.
fryedaddy
Image1966 caliente,428 4 speed,4.11 gears,nitrous,parachute

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