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05-10-2010, 04:17 PM
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#26 | |
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Account Suspended
Join Date: May 2004
Location: Simi Valley, CA
Posts: 1,387
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Re: what's necessary to do a big block swap?
Quote:
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05-10-2010, 04:52 PM
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#27 |
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Jason
Join Date: Sep 2008
Location: Wetumpka, AL
Posts: 152
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Re: what's necessary to do a big block swap?
Just got finished swapping out from a small block to big block on my 1971.
I used the tubular motor mounts from performance online, tubular transcrossmember from classic performance, and a set of Hedman part #HED-69136 headers and it bolted right in place. Only issues I had was with clearance to radiator gets a little close when using a long water pump when bolting engine in front holes on frame rail. I moved my motor back and redrilled holes in frame rails to give me more radiator to water pump clearance. Not sure about yours though with the serpentine setup you will just have to bolt it all in and see. |
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05-10-2010, 05:08 PM
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#28 |
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Watch out for your cornhole !
 
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: what's necessary to do a big block swap?
I've done the big block, turbo 400 swap into low hump cab trucks before and both trucks needed fresh cab mounts to get decent clearance between the floor and trans. Old saggy mounts allowed it to rub, new mounts gave enough clearance to pass your hand between the floor and trans.
__________________
I'm on the Instagram- @Gearhead_Kevin Last edited by Tx Firefighter; 05-10-2010 at 05:08 PM. |
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05-18-2010, 10:36 PM
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#29 |
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Account Suspended
Join Date: May 2004
Location: Simi Valley, CA
Posts: 1,387
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Re: what's necessary to do a big block swap?
progress-
getting the motor ready to drop in... 
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05-20-2010, 02:18 PM
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#30 | |
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Account Suspended
Join Date: Jan 2007
Location: Tucson
Posts: 2,183
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Re: what's necessary to do a big block swap?
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My truck is also a low hump cab with a turbo 400 and a big block installed...everything fit without any problems. |
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05-23-2010, 03:35 PM
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#31 |
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Registered User
Join Date: Feb 2010
Location: San Marcos, Ca
Posts: 109
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Re: what's necessary to do a big block swap?
I am starting this same project this week. I have a 71 gmc 2500 2wd 350/350 and I am going 454/350. Looks like I will be having some fun.
Thanks for the good info. |
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05-23-2010, 05:23 PM
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#32 | |
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Chevy Lover Till The End.
Join Date: Dec 2009
Location: Mascot TN.
Posts: 795
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Re: what's necessary to do a big block swap?
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__________________
1969 Chevy SWB Big Block - Under the knife as of 12/26/2011 1989 Chevy Silverado, 4X4 - Daily Driver 1996 Chevy Suburban K1500 - 4-Wheeler, Campin Truck 1968 Chevrolet Impala Sport Coupe - 327/350hp, TH400, all original. Members I've met: BamaBaxter, My Build: http://67-72chevytrucks.com/vboard/s...d.php?t=500359 |
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05-30-2010, 09:44 PM
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#33 |
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Account Suspended
Join Date: May 2004
Location: Simi Valley, CA
Posts: 1,387
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Re: what's necessary to do a big block swap?
progress-
    big block almost ready to drop in, just waiting for a few more pieces.   self powered 69 Panel! 
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07-13-2010, 02:44 AM
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#34 |
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wanna be 67
Join Date: May 2007
Location: Nor Cal
Posts: 696
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Re: what's necessary to do a big block swap?
that last picture looks like uncle kracker poking up through the engine bay.
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07-13-2010, 02:50 AM
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#35 |
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Account Suspended
Join Date: May 2004
Location: Simi Valley, CA
Posts: 1,387
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Re: what's necessary to do a big block swap?
motor's been in for awhile now, still need to work on getting the trans in.
Last edited by Sublvr72; 07-13-2010 at 02:50 AM. |
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07-13-2010, 02:09 PM
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#36 |
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Senior Member
Join Date: Aug 2008
Location: Cedar Park, Texas
Posts: 7,494
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Re: what's necessary to do a big block swap?
You will want to swap that TBI specific distributor for an older HEI with vacuum advance. Or your old SB point dist will work, if you have clearance issues with the large cap HEI.
I would use a Pertronix or similar. |
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07-13-2010, 02:27 PM
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#37 | |
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Senior Member
Join Date: Jul 2006
Location: Blountville, Tn.
Posts: 3,904
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Re: what's necessary to do a big block swap?
Quote:
__________________
*We could learn a lot from crayons... Some are sharp; some are pretty;and some are dull. Some have weird names; and all are different colours;but they all have to live in the same box. * You may be only one person in the world, But you may also be the world to one person. * Some mistakes are too much fun to only make once. Two rules in life. 1. Never sweat the small stuff! 2. Everything is small stuff! Last edited by BarryB; 07-13-2010 at 02:29 PM. |
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07-13-2010, 05:28 PM
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#38 |
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Account Suspended
Join Date: May 2004
Location: Simi Valley, CA
Posts: 1,387
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Re: what's necessary to do a big block swap?
yeah, I'm getting a new distributor and yes I found an auto x member from my old 74 that fits so I got that covered!
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07-26-2010, 10:44 AM
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#39 |
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Its Topless Season!!!!
Join Date: Jul 2007
Location: fort worth, tx
Posts: 1,657
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Re: what's necessary to do a big block swap?
Any updates? How much clearance do you have with the serpentine setup to your rad? R u going to run electric fans or can you run a clutch fan? Subscribed as I am going to run a similar setup on my 77BBC.
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04-08-2012, 12:23 AM
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#40 |
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Senior Member
Join Date: Aug 2008
Location: Cedar Park, Texas
Posts: 7,494
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Re: what's necessary to do a big block swap?
I know this is an old thread, but my pops and I are contemplating swapping the 6 cyl/ 3 ott in his 71 GMC for a 73 454 and a mid 80's 700r4. I still have the 73 donor and was thinking I would use the clamshells from it. Does anyone know if the 73 radiator wil fit?
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04-08-2012, 12:27 AM
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#41 | |
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Senior Member
Join Date: Aug 2003
Location: Lubbock, Texas
Posts: 2,443
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Re: what's necessary to do a big block swap?
Quote:
__________________
72 Cheyenne Super 80 Silverado Blazer 2wd |
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