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#1 |
Navy Radioman Veteran
Join Date: Jul 2007
Location: Western Kentucky
Posts: 1,350
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Big Block swap
I wanna swap out the 350 in my '87 for a 454. What kind of issues will I have in doing this? I have a line on some blocks, but nothing solid yet.
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#2 |
THE VILLIAGE IDIOT
Join Date: Nov 2006
Location: Tooele, Utah
Posts: 1,405
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Re: Big Block swap
shouldnt be that hard..id say motor mounts, definatly 4 core radiator, it will fit in with room to spare, especially if you dont have to run all that smog crap..my 84 454 has more stuff covering the motor than my lincolns did...also you migth need another tranny..if you are pulling alot with it, get rid of the 350 turbo, and get a 400 turbo...also get ready to pass anything but a gas station... but i would definatly recommned it,, my next project truck, when i get done with the dually will be 1/2 with a 454...
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honestly honey,,i have no idea how that truck got here. ![]() |
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#3 |
Navy Radioman Veteran
Join Date: Jul 2007
Location: Western Kentucky
Posts: 1,350
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Re: Big Block swap
Great!
Motors seem to hard to find these days, but when I do, I'll get one. Just building a cruiser... no towing with this one. Thanks!
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1987 Chevrolet R10 Silverado BBC Build thread - SOLD 1986 GMC Sierra Classic - SOLD 1957 Chevy Step Side - At the Body Shop Daily Driver; 2005 Chevrolet Silverado 4x4 Z71 Stepside |
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#4 |
Registered User
Join Date: Sep 2000
Location: Gold Bar, WA
Posts: 1,216
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Re: Big Block swap
You can use your original mounts. I did when I replaced the 454 in my 84 Suburban with a 350. You will need a 3 core or 4 core radiator with the shroud. You may also have to modify your exhaust, I had to on the 84. The big block manifolds on my 84 had a 2.5 inch outlet and the 350 manifolds I bought have something like a 2 inch outlet.
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My Projects: 1960 GMC 1/2ton with 305 V6 (daily driver) 1963 Chevy 1/2ton 2wd...converting to 4x4 1967 Suburban 1/2ton 2wd My Girlfriends Projects 1985 Chevy Suburban 3/4ton 4x4 with 6.2L diesel, 4" lift, converted to TH-400, Warn Premium manual hubs, & Wildcat 315/75/R16 tires. (daily driver) 1978 Camaro Type LT with a Marine 350 & vortec heads, Rochester Carb, & roller cam 1978 Camaro Z28 |
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#5 |
Navy Radioman Veteran
Join Date: Jul 2007
Location: Western Kentucky
Posts: 1,350
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Re: Big Block swap
Thanks for the info!!
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1987 Chevrolet R10 Silverado BBC Build thread - SOLD 1986 GMC Sierra Classic - SOLD 1957 Chevy Step Side - At the Body Shop Daily Driver; 2005 Chevrolet Silverado 4x4 Z71 Stepside |
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#6 |
Registered User
Join Date: Sep 2005
Location: Sun City West, Az
Posts: 3,822
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Re: Big Block swap
by the way,welcome aboard...and nice truck.i scoped her out over in the shortbed thread.hey that rhymes
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" Never look up a dead dogs butt." ![]() |
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#7 |
Bulky
Join Date: Aug 2004
Location: Rhode Island
Posts: 163
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Re: Big Block swap
Come on up to Rhode Island...I'll cut you a deal on a complete rolling chassis.... it has all the parts you will need to put a big block in, exhaust manifolds, radiator, shroud, hoses, power steering pump, motor mounts...and you can sell the rest of the truck to make your money back. ...just a thought.
http://67-72chevytrucks.com/vboard/c...ct=1758&cat=13
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2016 Silverado 1930 Model A Hot Rod 1923 Ford A/SR Altered - Injected 409 1982 Honda CB900F Super Sport Dad's 1970 GMC 9' Stepside Dad's 1969 GMC Custom Camper |
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#8 |
www.73-87chevytrucks.com
![]() Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
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Re: Big Block swap
Does your truck still have TBI on it? What trans are you running now, and is the motor the orginal from 1987?
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Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
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#9 |
Navy Radioman Veteran
Join Date: Jul 2007
Location: Western Kentucky
Posts: 1,350
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Re: Big Block swap
Yes, it's original with the TBI and the 700R4. I thinks it's been gone through though, it's pretty strong.
bulky - I be sure to look u up IF I get up north. thanks!
__________________
1987 Chevrolet R10 Silverado BBC Build thread - SOLD 1986 GMC Sierra Classic - SOLD 1957 Chevy Step Side - At the Body Shop Daily Driver; 2005 Chevrolet Silverado 4x4 Z71 Stepside |
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#10 |
Bulky
Join Date: Aug 2004
Location: Rhode Island
Posts: 163
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Re: Big Block swap
Ahh...it's only 1000 miles... just a nice Sunday drive! I'm supposed to go visit a buddy in Wilmington OH this summer, I'll drop you a line when I go, if your still looking, I'l bring what I have.
Later
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2016 Silverado 1930 Model A Hot Rod 1923 Ford A/SR Altered - Injected 409 1982 Honda CB900F Super Sport Dad's 1970 GMC 9' Stepside Dad's 1969 GMC Custom Camper |
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#11 |
www.73-87chevytrucks.com
![]() Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
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Re: Big Block swap
Are you planning on running the TBI on the 454? If so, it is going to be restrictive. The TBI throttle bore is larger and had bigger injectors, you also need the PROM for a 454.
__________________
Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
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