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#1 |
Registered User
Join Date: Jul 2014
Location: Hanna, Alberta
Posts: 30
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489 BBC Swap
Hey all, my friend has a Chevy 489 (bored and stroked 454) for sale and I couldn't pass up the opportunity to buy it. The motor will be swapped with my 350 and I have a few questions about the swap.
1. Would I need to do/buy anything else beside motor mounts? 2. I will mainly be driving my truck on the street and occasionally on the strip at local races. My rear end gear ratio is a 4.10 and I am wondering will higher "highway" revs hurt my bbc? I wouldn't think so, but I've had a few different opinions. 3. Will my TH350 be a reliable transmission? Will I need a shift kit or another torque converter? Any and all help is greatly appreciated. Thanks in advance! |
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#2 |
Registered User
Join Date: Jul 2014
Location: Missouri
Posts: 1,427
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Re: 489 BBC Swap
I'd think a new trans to handle the big increase in power which means a new driveshaft ... Just a thought. Probably a better radiator since you plan on driving it. Uh. Misc hoses and stuff like that.
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Jack Personal Fleet: Family Fleet: 1955.5 Panel 1959 Apache 1968 ShortWide 1969 ShortStep |
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#3 |
Registered User
Join Date: Jul 2014
Location: Missouri
Posts: 1,427
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Re: 489 BBC Swap
Just noticed the occasional strip use. Def a new trans or you'll grenade the th350. Sell the 350/350 unit for a th400 and a driveshaft for a 396/th400 truck it should fit.
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Jack Personal Fleet: Family Fleet: 1955.5 Panel 1959 Apache 1968 ShortWide 1969 ShortStep |
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#4 |
Registered User
Join Date: Jul 2014
Location: Hanna, Alberta
Posts: 30
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Re: 489 BBC Swap
Awesome, thanks. I did get the rad (Griffin) and dual fan setup that was with the bbc aswell with my purchase. But good thinking for the trans. I did happen to notice that when I bought the truck, the original 2 piece drive shaft was upgraded to a newer one piece. Not sure if that helps or makes much of a difference in the long run.
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#5 |
Registered User
Join Date: Jul 2014
Location: Missouri
Posts: 1,427
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Re: 489 BBC Swap
What's the truck like, I love pics!
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Jack Personal Fleet: Family Fleet: 1955.5 Panel 1959 Apache 1968 ShortWide 1969 ShortStep |
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#6 |
Registered User
Join Date: Jul 2014
Location: Hanna, Alberta
Posts: 30
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Re: 489 BBC Swap
Bought her online from a fellow in Texas and have plans of giving her a makeover when the snow falls.
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#7 |
Registered User
Join Date: Jul 2014
Location: Hanna, Alberta
Posts: 30
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Re: 489 BBC Swap
..
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#8 |
Registered User
Join Date: Jul 2014
Location: Hanna, Alberta
Posts: 30
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Re: 489 BBC Swap
Here's the bored and stroked 454
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#9 |
Registered User
Join Date: Jul 2014
Location: Missouri
Posts: 1,427
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Re: 489 BBC Swap
Looks good, keep us all updated on the build.
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Jack Personal Fleet: Family Fleet: 1955.5 Panel 1959 Apache 1968 ShortWide 1969 ShortStep |
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#10 | |||
Registered User
Join Date: Jul 2014
Location: phx az
Posts: 324
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Re: 489 BBC Swap
you are going to need a list of whats inside that motor to answer most of your questions. Compression ration, head castings, cam etc..
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no worries, just think of it this way, it’s a grown up sbc. You have one in the truck running right now, so besides exhaust, there really is no difference. You can pull your 350 and install the 454 in a few hours and have it running. If it were me, id leave the trans the way it is now, to get the motor in and running and work out any possible non-foreseen problems. Then build a trans at a later date.
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tubbed 1984 gmc jmmy http://67-72chevytrucks.com/vboard/s...d.php?t=639738 Alice Hombre http://67-72chevytrucks.com/vboard/s...d.php?t=808454 1963 Scout Retro-mod https://67-72chevytrucks.com/vboard/...d.php?t=854167 |
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#11 |
Registered User
Join Date: Jul 2014
Location: Missouri
Posts: 1,427
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Re: 489 BBC Swap
Motor mounts are a bit different. A few inches forward or backward I believe.
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Jack Personal Fleet: Family Fleet: 1955.5 Panel 1959 Apache 1968 ShortWide 1969 ShortStep |
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#12 |
Registered User
Join Date: Jul 2014
Location: Missouri
Posts: 1,427
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Re: 489 BBC Swap
X2 on redneck
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Jack Personal Fleet: Family Fleet: 1955.5 Panel 1959 Apache 1968 ShortWide 1969 ShortStep |
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#13 |
Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: 489 BBC Swap
The BBC stands are different to allow for stranger insulators aren't they? The SBC mounts will bolt up but they get ate out pretty quick.
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#14 |
Registered User
![]() Join Date: Jun 2006
Location: Tucson, Az
Posts: 705
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Re: 489 BBC Swap
I have a complete set of oe 1972 bbc motor mounts lmk if your interested i'm getting ready to list some stuff for sale.
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Tags |
1972c10, 350, 489, bbc, bbcswap |
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