Is a big block converion possible? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DaPrato300 · 02-15-2010, 10:01 PM

I have a 62 C10 with a 350 small block. I would love to be able to put a big block in it. I was curious if anyone knew what all would have to be changed over to be able to put a big block in? Is is just a motor mount change or what.

**Chevy Fleetside** · 02-15-2010, 11:38 PM

http://67-72chevytrucks.com/vboard/s...d.php?t=259536 This is what I did. You don't have to go to this extreme. I just wanted the engine to sit back in the engine compartment. Pretty much changing out the motor mounts is the major thing.
The frame on the 62 is also not as tall as on a 63-66 so spacers on top of the mounts will be needed. I know others will chime in with thier BB builds and pictures.

62gmc910 · 02-15-2010, 11:48 PM

Thereis a little bit of a clearance with the rocker covers , it bolts to the bellhousing,and if you have side mounts on the 350 they bolt to the big block
If you are running an automatic you might want to go with 73-87 mounts and modify the tops to fit the frame or space them depends on your taste . some guys move the engine forward but back is better , and the distributor is farther forward in the BBC so clearance isn't an issue , the truck in my avatar has been big block since '78 with the bellhousing bolted to the stock crossmember

1Bad62Pro/Street · 02-16-2010, 07:03 AM

Quote:

Originally Posted by DaPrato300

I have a 62 C10 with a 350 small block. I would love to be able to put a big block in it. I was curious if anyone knew what all would have to be changed over to be able to put a big block in? Is is just a motor mount change or what.

What size big block are you considering?

DaPrato300 · 02-16-2010, 06:20 PM

I can get my hands on a 454 pretty easily so I would say I'd go with a 454ci. This summer after my trip to KS junkyarding I plan to put a 73-87 front end under it to get the disc brakes and Ill also do the power steering conversion then to. Will that suspension be hefty enough to handle the extra weight of a 454? Im sure it will be but then agian I've never tooled around on something this old.

steverino66 · 02-16-2010, 08:01 PM

no worries on the weight issue - the old 350 in my 66 lowered the front end about 3 inches on the stock 6-cyl. springs, but I swapped in an 83 front end and the 454 in there now doesn't compress the springs noticeably

1Bad62Pro/Street · 02-16-2010, 08:23 PM

Pro/Street it!

DaPrato300 · 02-17-2010, 05:13 PM

With completeing a 73-87 front end swap all I should have to do then is just swap out the small block motor mounts for big block ones correct? I have only tooled around with LT1's and LS1's. This 1962 is greek to me.

A plate will bolt onto the motor and the mount will bolt to the K-member then only one bolt holds the 2 together?

1Bad62Pro/Street I would love to do a full tub on the rear and do up a prostreet truck, but this truck has to get me to an from work, but then agian work is only 8 miles away.

DaPrato300 · 02-17-2010, 09:49 PM

Alright.. another stupid question.. transmissions.. will a small block transmission say a turbo 350 bolt up to a big block 454? I know mopars you gotta switch out the bell housing is that the case with GM?

Sinister-65 · 02-17-2010, 11:01 PM

the trans will bolt up no problem.

**Captainfab** · 02-18-2010, 01:53 AM

For motor mounts I like the '73-'87 style. If you get the frame brackets from a '73-'87 C20 they will fit the earlier frames better. Then the motor mounts themselves bolt to those. Then the 'clamshell' bolts to the block and a single 7/16" bolt locks the two together. Take a look inthe 'Projects and Builds' section at Protrash64's 1964 Suburban pics thread. Those are the mounts he is using, except he is using the C10 brackets.

64bigblock · 02-24-2010, 12:58 AM

just take a big ball peen hammer and tap the firewall in and the valve covers will fit and drive it

02-15-2010, 10:01 PM	#1
DaPrato300 Registered User Join Date: Feb 2010 Location: Oak Harbor,WA Posts: 21	Is a big block converion possible? I have a 62 C10 with a 350 small block. I would love to be able to put a big block in it. I was curious if anyone knew what all would have to be changed over to be able to put a big block in? Is is just a motor mount change or what.

02-15-2010, 11:38 PM	#2
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,783	Re: Is a big block converion possible? http://67-72chevytrucks.com/vboard/s...d.php?t=259536 This is what I did. You don't have to go to this extreme. I just wanted the engine to sit back in the engine compartment. Pretty much changing out the motor mounts is the major thing. The frame on the 62 is also not as tall as on a 63-66 so spacers on top of the mounts will be needed. I know others will chime in with thier BB builds and pictures. __________________ "A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 Last edited by Chevy Fleetside; 02-15-2010 at 11:39 PM.

02-15-2010, 11:48 PM	#3
62gmc910 Registered User Join Date: Nov 2009 Location: Cremona AB Canada Posts: 370	Re: Is a big block converion possible? Thereis a little bit of a clearance with the rocker covers , it bolts to the bellhousing,and if you have side mounts on the 350 they bolt to the big block If you are running an automatic you might want to go with 73-87 mounts and modify the tops to fit the frame or space them depends on your taste . some guys move the engine forward but back is better , and the distributor is farther forward in the BBC so clearance isn't an issue , the truck in my avatar has been big block since '78 with the bellhousing bolted to the stock crossmember __________________ 62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck)

02-16-2010, 06:20 PM	#5
DaPrato300 Registered User Join Date: Feb 2010 Location: Oak Harbor,WA Posts: 21	Re: Is a big block converion possible? I can get my hands on a 454 pretty easily so I would say I'd go with a 454ci. This summer after my trip to KS junkyarding I plan to put a 73-87 front end under it to get the disc brakes and Ill also do the power steering conversion then to. Will that suspension be hefty enough to handle the extra weight of a 454? Im sure it will be but then agian I've never tooled around on something this old.

02-16-2010, 08:01 PM	#6
steverino66 Registered User Join Date: Oct 2005 Location: oklahoma Posts: 663	Re: Is a big block converion possible? no worries on the weight issue - the old 350 in my 66 lowered the front end about 3 inches on the stock 6-cyl. springs, but I swapped in an 83 front end and the 454 in there now doesn't compress the springs noticeably

02-16-2010, 08:23 PM	#7
1Bad62Pro/Street "Where were you in '62?" Join Date: Jul 2004 Location: Cleveland County, North Cackalacky Posts: 5,013	Re: Is a big block converion possible? Pro/Street it! __________________ PROJECT: "FULL METAL YELLOW JACKET" 1962 Chevy C-10 Stepside Shortbed Nostalgia Pro/Street Pickup Truck PROJECT: "FULL METAL YELLOW JACKET Build Thread What Are You Workin' On? - 1Bad62ChevyPickup PROJECT: "TYRANNORAMBLER REX" 1969 AMC Rambler American Nostalgia Pro/Street Youtube Channel: Father Son Projects Youtube Channel: 2TIMOTHY2FITHTEEN "North and South Carolina Folks Click Here!" (((( ~ I have Parts For Sale & Miscellaneous Stuff ~ )))) "Well being as there's no other place around the place, I reckon this must be the place, I reckon...Nyuk Nyuk Nyuk" -Curly Howard Ph.D.

02-17-2010, 05:13 PM	#8
DaPrato300 Registered User Join Date: Feb 2010 Location: Oak Harbor,WA Posts: 21	Re: Is a big block converion possible? With completeing a 73-87 front end swap all I should have to do then is just swap out the small block motor mounts for big block ones correct? I have only tooled around with LT1's and LS1's. This 1962 is greek to me. A plate will bolt onto the motor and the mount will bolt to the K-member then only one bolt holds the 2 together? 1Bad62Pro/Street I would love to do a full tub on the rear and do up a prostreet truck, but this truck has to get me to an from work, but then agian work is only 8 miles away.

02-17-2010, 09:49 PM	#9
DaPrato300 Registered User Join Date: Feb 2010 Location: Oak Harbor,WA Posts: 21	Re: Is a big block converion possible? Alright.. another stupid question.. transmissions.. will a small block transmission say a turbo 350 bolt up to a big block 454? I know mopars you gotta switch out the bell housing is that the case with GM?

02-17-2010, 11:01 PM	#10
Sinister-65 Registered User Join Date: Dec 2008 Location: Jacksonville,Fl Posts: 93	Re: Is a big block converion possible? the trans will bolt up no problem. __________________ Its easier to beg for forgiveness than ask permission.

02-18-2010, 01:53 AM	#11
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Is a big block converion possible? For motor mounts I like the '73-'87 style. If you get the frame brackets from a '73-'87 C20 they will fit the earlier frames better. Then the motor mounts themselves bolt to those. Then the 'clamshell' bolts to the block and a single 7/16" bolt locks the two together. Take a look inthe 'Projects and Builds' section at Protrash64's 1964 Suburban pics thread. Those are the mounts he is using, except he is using the C10 brackets. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

02-24-2010, 12:58 AM	#12
64bigblock Registered User Join Date: Jan 2010 Location: monona, iowa Posts: 9	Re: Is a big block converion possible? just take a big ball peen hammer and tap the firewall in and the valve covers will fit and drive it



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