8.1 Swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**1970 CST Short Wide** · 10-02-2013, 11:59 AM

Has anyone installed an 8.1 with 4L80 trans in a 67-72. I have one and want to repace my 454 with it. Any help would be Greatly appreciated.

Steve

BR3W CITY · 10-02-2013, 03:53 PM

Its not the same designs as the other ls motors. Most of us pass on thenm due to limited aftermarket support and poor fuel econemy for what they deliver. If its a tow rig they arent bsd.
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**AMERICAN PICK-UP** · 10-02-2013, 04:02 PM

Quote:

Originally Posted by 1970 CST Short Wide

Has anyone installed an 8.1 with 4L80 trans in a 67-72. I have one and want to repace my 454 with it. Any help would be Greatly appreciated.

Steve

they are not LS engines they are the last of the big block chevys. 496 cubic inch big block chevy. i have sold several of them the last one that i sold went into a 69 chevelle.

**1970 CST Short Wide** · 10-02-2013, 05:07 PM

Quote:

Originally Posted by AMERICAN PICK-UP

they are not LS engines they are the last of the big block chevys. 496 cubic inch big block chevy. i have sold several of them the last one that i sold went into a 69 chevelle.

So it should bolt in place of my 454 then?? I know its not an LS but the price was right and I'll have overdrive AND fuel injection

ofnaman · 10-02-2013, 05:17 PM

Quote:

Originally Posted by 1970 CST Short Wide

So it should bolt in place of my 454 then?? I know its not an LS but the price was right and I'll have overdrive AND fuel injection

It should bolt right up. I was considering the 8.1's as well, but ended up going ls.

10-02-2013, 11:59 AM	#1
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,046	Has Anybody done 8.1 Swap ?????? Has anyone installed an 8.1 with 4L80 trans in a 67-72. I have one and want to repace my 454 with it. Any help would be Greatly appreciated. Steve __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 Last edited by 1970 CST Short Wide; 10-02-2013 at 02:01 PM.

10-02-2013, 03:53 PM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: 8.1 Swap Its not the same designs as the other ls motors. Most of us pass on thenm due to limited aftermarket support and poor fuel econemy for what they deliver. If its a tow rig they arent bsd. Posted via Mobile Device __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD



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