6 for 8 engine swap

coltstrader · 11-06-2008, 06:41 PM

I have gotten a lot of different information, but would like opinions on swapping my blown 318 in a 1977 3/4 ton automatic trans 4x4 for a rebuilt slant six. The exchange book says no, junk yard says yes If I use the six torque converter. Supposedly the 318 is internally balanced and the six is external, and if I use the six converter, I am ok, otherwise most everything bolts up, any thoughts, thanks ss.

stumpuller454 · 11-06-2008, 07:15 PM

i`m not 100% but most manufacturers use the flexplate when balencing an external balenced engine, although i can see it possible to have weights put on the converter, it would have to be bolted on to the flexplate in the correct correlation, otherwise it may shake like crazy! Is the slant 6 of the same year/make? Maybe they were just talking about the flexplate not the converter?

P.S. WELCOME ABOARD!

87c10slammer · 11-06-2008, 10:39 PM

yeah i think they are talking about te flex plate not the converter... if it was the converter then they couldnt sell oem ones by themselves they would have to sell a hole motor with it... lol... i have never heard of such a thing so i wuld look into your sources a little bit more.. i say they are totally wrong.. they may be talking about bolt holes from the flex plate to the converter not lining up... or the splines not matching the trannys one... im sure there are conversions around or someone that has done it... anything is achievable now adays

coltstrader · 11-07-2008, 05:07 AM

You both may be right, surely someone has pulled this off, will continue to check, thanks so much for the quick replies, I really appreciate the help from forums like this, they have saved me several times, as I can't afford 80 bucks an hour.

terrywerm · 02-17-2009, 04:09 PM

You don't balance the engine with the torque converter or with the flywheel/flexplate. Those parts are balanced independently so that when mounted on an engine they will not disrupt the existing balance of the assembly.

leolkfrm · 02-17-2009, 04:12 PM

terry i see you are a newbe, check dates on posts, if they are more than a month old an inactive there is no sense posting

11-06-2008, 06:41 PM	#1
coltstrader Junior Member Join Date: Nov 2008 Posts: 2	6 for 8 engine swap I have gotten a lot of different information, but would like opinions on swapping my blown 318 in a 1977 3/4 ton automatic trans 4x4 for a rebuilt slant six. The exchange book says no, junk yard says yes If I use the six torque converter. Supposedly the 318 is internally balanced and the six is external, and if I use the six converter, I am ok, otherwise most everything bolts up, any thoughts, thanks ss.

11-06-2008, 07:15 PM	#2
stumpuller454 Senior Member Join Date: Dec 2007 Location: Grande Prairie, AB Posts: 2,043	i`m not 100% but most manufacturers use the flexplate when balencing an external balenced engine, although i can see it possible to have weights put on the converter, it would have to be bolted on to the flexplate in the correct correlation, otherwise it may shake like crazy! Is the slant 6 of the same year/make? Maybe they were just talking about the flexplate not the converter? P.S. WELCOME ABOARD! __________________ SUPERCHARGED 454 K2500 GMC! 450hp and 600ft/lbs http://www.youtube.com/watch?v=WJ27RJHfJKE "sailing with Captain Morgan often!"

02-17-2009, 04:09 PM	#5
terrywerm Junior Member Join Date: Feb 2009 Location: Jordan, MN Posts: 6	You don't balance the engine with the torque converter or with the flywheel/flexplate. Those parts are balanced independently so that when mounted on an engine they will not disrupt the existing balance of the assembly. __________________ Terry Real trucks rattle! '01.5 Dodge Ram, QC, SB, 4x4, 5.9 CTD, 5 Spd '99 Dutchmen 30' 5th wheel '87 Jeep YJ, 6 cyl, 5 spd (project)

02-17-2009, 04:12 PM	#6
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	terry i see you are a newbe, check dates on posts, if they are more than a month old an inactive there is no sense posting __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

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11-06-2008, 10:39 PM	#3
87c10slammer Banned Join Date: Mar 2008 Location: levittown pa Posts: 2,197	yeah i think they are talking about te flex plate not the converter... if it was the converter then they couldnt sell oem ones by themselves they would have to sell a hole motor with it... lol... i have never heard of such a thing so i wuld look into your sources a little bit more.. i say they are totally wrong.. they may be talking about bolt holes from the flex plate to the converter not lining up... or the splines not matching the trannys one... im sure there are conversions around or someone that has done it... anything is achievable now adays

11-07-2008, 05:07 AM	#4
coltstrader Junior Member Join Date: Nov 2008 Posts: 2	You both may be right, surely someone has pulled this off, will continue to check, thanks so much for the quick replies, I really appreciate the help from forums like this, they have saved me several times, as I can't afford 80 bucks an hour.

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