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08-11-2003, 07:48 PM
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#1 |
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big block lover
Join Date: Jul 2002
Location: louisiana
Posts: 107
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454 swap..
hey i found a rebuilt 454 here in town for a great price..ready to swap...
what all could i expect to have to change to get this in my 81...there is currently a 327 with a th350..2.73 rear gears... im gonna look at the engine this week, hopefully tomm.... are there things i should look for concerning the 454 specifically never really messed with one. i would think that the th350 would get crushed with the 454 torque and power.....so i am thinking that i could get a th400 to go with it..."since i found one of those also"... how would i know if i needed a short or long shaft? what else should i expect to have to change... looking forward to your tips... thanks, anthony |
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08-11-2003, 09:39 PM
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#2 |
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Senior Member
Join Date: Jan 2003
Location: Atlantic City, NJ
Posts: 1,073
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You can start your grocery list with
Brackets and pulleys (PS pump) Headers Waterpump Fuel system Radiator (4 row) Turbo 400 and new converter Motor mounts After you finish with all that you probably will need regular rear tire replacements 
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86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction 
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08-12-2003, 01:40 AM
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#3 |
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big block lover
Join Date: Jul 2002
Location: louisiana
Posts: 107
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well the engine im looking at is supposed to be complete...
so maybe i wont have to get all the pulleys and stuff... i hope this works out... |
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08-12-2003, 06:53 AM
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#4 |
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yeller
Join Date: Oct 2001
Location: Twin Cities
Posts: 13,824
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Engine mouns are the same or a 350 and 454.
Otherwise Airmale listed pretty much everything. Good luck and keep us posted. ...Jeff |
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08-13-2003, 03:21 PM
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#5 |
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big block lover
Join Date: Jul 2002
Location: louisiana
Posts: 107
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can i use my existing ps pump, alt, and A/C compressor...
do i need to change pulleys on those.. i have been told that a th350 will holp up the the 454 as long as i dont do any towing or heavy hauling... i plan on having the th350 rebuilt shortly after installing the 454. i guess i can just beef it up...or would it be cheaper to get a th400 and rebuild it? so many questions, so little time!
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81 custom deluxe lwb 454 bored .030 over w/ small RV cam. 2.5 exaust- thrush turbo muffs. th350 getting beefed up soon! |
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08-13-2003, 03:34 PM
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#6 |
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Slots go on anything!
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
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you can use all of those accessories, but you will need to use 454 brackets for them. I would use the 400, as if you are making any power, it will kill the TH350 in a hurry.
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1974 Jimmy- 5.3/4L80e/NP241 |
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08-13-2003, 04:49 PM
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#7 |
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Registered User
Join Date: Mar 2003
Location: Walker, LA
Posts: 2,925
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Hey Anthony, not to hi-jack this thread, but are you going to the Street Legal drags this Sunday at No Problem? I may go, it depends on the shape my truck is in. I got a tach and gears coming this week.
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Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels |
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08-13-2003, 05:04 PM
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#8 |
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big block lover
Join Date: Jul 2002
Location: louisiana
Posts: 107
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gary... i might be able to go...i didnt know that was goin on though....pm me if you go..i dont think i have anything to do on sunday...and i have a buddy coming in so that might be a kick ass day...how much is the entry there?
Last edited by 81lwb350; 08-13-2003 at 05:06 PM. |
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08-13-2003, 05:54 PM
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#9 |
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Registered User
Join Date: Mar 2003
Location: Walker, LA
Posts: 2,925
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Here check this out, http://www.noproblemraceway.com/npr/...al%20Drags.pdf
I probably will not know if I'm going until Saturday, but I will pm you either way.
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Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels |
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08-13-2003, 06:36 PM
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#10 |
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big block lover
Join Date: Jul 2002
Location: louisiana
Posts: 107
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awesome.....gotta see the truck and suv eliminator!
dont forget to sand bag.. |
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08-13-2003, 06:38 PM
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#11 |
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Senior Member
 
Join Date: Dec 1999
Location: Darrington, Washington
Posts: 3,963
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I put a big block in my 79.Only thing you need is the motor the motor towers are the same,the water pump pulley i found was the same.you can use the small block PS pump,youll just need the big block AC brackets,crank pulley,ps brackets,alt brackets.your T350 will be fine,as long as you arent doing weekely drag racing,or heavy towing.If you have any questions email me
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08-14-2003, 09:43 AM
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#12 |
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big block lover
Join Date: Jul 2002
Location: louisiana
Posts: 107
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if the water pump pulleys are the same, then could i still use my small block fan?
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81 custom deluxe lwb 454 bored .030 over w/ small RV cam. 2.5 exaust- thrush turbo muffs. th350 getting beefed up soon! |
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08-14-2003, 09:23 PM
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#13 |
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big block lover
Join Date: Jul 2002
Location: louisiana
Posts: 107
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i got it....
i went and picked up the 454 today after work...
man, i am so exited...cant wait to get it in....just a couple of weeks to gets the rest of the parts that i need and it peelin tires.... wish me luck... i'll take pics and take some notes along the way for everyone else.... thanks for everyones help!
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81 custom deluxe lwb 454 bored .030 over w/ small RV cam. 2.5 exaust- thrush turbo muffs. th350 getting beefed up soon! |
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08-14-2003, 10:35 PM
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#14 |
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Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Byebye gas milage, hello burnout!
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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