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#21
12-12-2014, 07:03 PM
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Re: ZLX question
I'd say a GM #198 open plenum dual plane. Same as a standard ZL1.
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1962 Biscayne O-21669 MKIV/M-22 1962 Bel Air Sport Coupe 409/1,000 
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#22
12-12-2014, 07:51 PM
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Re: ZLX question
That's my thoughts too. I've been searching the internet and only coming up with tunnel ram info. Seems like some had the Edelbrock TR-2X but the '69 Camaro's had a tunnel ram with ribs on the floor of the tunnel ram and D ports under the carb????
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'58 Apache pick up '78 Z28 4sp being restored '70 W30 convert TRIBUTE '78 Z28 32,000 survivor, Og Yellow paint, AC. '69 CANADIAN Nova SS 396/350 hp '67 CANADIAN Nova SS 427 10 sec. driver '66 CANADIAN Nova SS Race Car '61 CANADIAN Pontiac Bubble top 409+/4sp (SOLD) '31 ALL STEEL Chevy P.U. GONE (EX-WIFES NOW)
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#23
12-18-2014, 03:08 PM
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Re: ZLX question
So after some research, I think I found out a few things:
Also noted in the listing is the you COULD get a 480" version for Marine??? Heads seems to be a bit confusing? Seems "originally", you would get the 026 heads, and later the 990's. BUT seems like you get order the ZLX short with 074 heads! As was seen on Kevin's '69 Z28 ZLX conversion. As for the intake, seems the #198 intake was on the engines UNLESS you went to the FULL COMPETITION top-of-the-line Hp rated engines, THEN it looks like you got a Weiand Tunnel ram. MUSCLECARKID, you posted an piece for your 1976 Motion Performance Guide, and it shows a ZLX427 with 650Hp. I wonder what the ZLX454 and ZLX480 made? If the 427 was 650, just using the cu/hp formula, the 454 should be about 490 and the 480 should be around 730!! Wonder if any of those made there way into a car???? LOOKS LIKE ONE WILL NOW THOUGH!
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'58 Apache pick up '78 Z28 4sp being restored '70 W30 convert TRIBUTE '78 Z28 32,000 survivor, Og Yellow paint, AC. '69 CANADIAN Nova SS 396/350 hp '67 CANADIAN Nova SS 427 10 sec. driver '66 CANADIAN Nova SS Race Car '61 CANADIAN Pontiac Bubble top 409+/4sp (SOLD) '31 ALL STEEL Chevy P.U. GONE (EX-WIFES NOW)
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#24
12-18-2014, 10:00 PM
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Re: ZLX question
Picture taken when Kevin S. owned it.
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Rick Nelson Musclecar Restoration and Design, Inc www.musclecarrestorationanddesign.com https://www.youtube.com/watch?v=62r-6vgk2_8 specializing in (only real) LS6 Chevelle restorations
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