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  #16 (permalink)  
Old 08-13-2012, 08:20 PM
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ok bro iv got the same engine in a camaro one bad mother this is what to do about the square intake 'buy a square type of spacers one set of square port gasket and one set of large oval small tube of black gasket maker now put the oval on then a small layer of gasket then the spacers and finally the square gasket tightendown the intake run intill engine get warm retighten the bolts from center out ward remember u can put square on oval but not oval on square dont let anyone put down your 366 because iv won a camaro and a mustang and mine just has a points dis and a cam Qjet that spins threw 4th with 22 slicks good luck

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Old 10-14-2014, 09:02 AM
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Holy thread resurrection full of fail I had to.
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  #18 (permalink)  
Old 10-14-2014, 11:02 AM
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welcome to the forum roller. not worth bringing up old threads like this,,,, start your own? what do you have for wheels?
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Old 10-16-2014, 10:03 AM
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So full of fail, the tall deck 366 and tall deck 427 were available in medium duty trucks until 1998.
It was replacfed by the medium duty L21 Vortec 454 with 8 coild packs, electronic throttle control and dual 80 pin 512 kb PCM. Its a Vortec 454 with a 24x reluctor. Electronically it thinks its a Vette LS1.

The L21 was available from 1998-2000 for teh most part, it was the 1st GM engine to get 8 coils and ETC. Not to be confused with the 1996-2000 Vortec 454 rpo L29 which came in 3/4 ton and 1 ton GMT 400 style trucks. It uses the 4 x reluctor ,"black box" PCM's, and Vortec style flat crab distributer/cam position sensor combo.
The L21 cam in heavier medium duty motorhomes and cab and chassis etc.
L21 Applications:
19982001 Chevrolet Kodiak/GMC TopKick/Isuzu H-Series 4500 5500
19981999 Chevrolet Suburban 2500/GMC Suburban 2500 (option)
19982000 Chevrolet Express 3/4 or 1 ton
19982001 Kodiak/Topkick
19982001 P12 HD Motorhome Chassis. The Workhorse W-20 is a clone of the P12 Chassis

L21/29 share roller cams, intakes, injectors the L21 got sodium filled exhaust valves and other changes for CNG/LPG sustained WOT usage.

The GEN 7 8.1 came next in line for 2001.

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Old 01-12-2016, 06:56 PM
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1997topkick 366 tbi

Hey guys I have a 1997 topkick with a 366 tbi motor, it aint fast but runs fine with the proper amt of maintenance.
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Old 01-12-2016, 07:55 PM
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WOW this thread started in 2011 and still going............
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