Chevrolet Big Block vs Little Block

Joe DeMarzo · 09-03-2007, 01:58 PM

How much does a chevy big block weight over a small block? Anyone swap and know the difference?

Thnaks

Mark Lewis · 09-03-2007, 02:12 PM

Steel head for steel head about 100 lbs. Aluminum head big block vs steel head small block is about 15 lbs if I remember correctly.

FED 387 · 09-03-2007, 02:39 PM

396/427 BBC weighs 685 iron head/ iron block/iron intake
454 about 675 iron/iron/iron
SBC chev about 575 iron/iron/iron---take about 40 pounds off for alum int manifold or 535

Joe DeMarzo · 09-04-2007, 08:00 AM

Thank you

Dwight Southerland · 09-04-2007, 10:53 AM

????

When I converted my '67 Camaro from a Z-28 (D/S) to an SS w/396 375 (A/S), the car weighed 180 lbs more when finished. That was in 1985 so the engines used stock rods, cranks, pistons and iron water pumps. Consider SS hood with cast louvers, SS emblems and 396 emblems added, but removal of factory 4-piston disc brakes w/booster replaced by factory drum brakes. Additional bars were added to the roll bar and 2" x 2" .083" subframe connectors were welded in at the same time. Maybe some additional weight in the headers. All food for thought.

Adger Smith · 09-04-2007, 11:53 AM

Dwight,
I did the disc brake change on my 69 Z-28 in 1970. I used all the front suspension on a 6 cylinder donor car. My old faded memory says it was 38 lbs different in the disc set up & that included the lighter idler arm, drag link,pittman arm & manual steering box from the 6 cyl. car.

09-03-2007, 01:58 PM	#1
Joe DeMarzo Senior Member Join Date: Oct 2002 Location: Mahopac, NY Posts: 666 Likes: 48 Liked 113 Times in 9 Posts	Chevrolet Big Block vs Little Block How much does a chevy big block weight over a small block? Anyone swap and know the difference? Thnaks __________________ Joe DeMarzo 1317 STK

09-03-2007, 02:12 PM	#2
Mark Lewis Member Join Date: Apr 2006 Posts: 344 Likes: 62 Liked 206 Times in 43 Posts	Re: Chevrolet Big Block vs Little Block Steel head for steel head about 100 lbs. Aluminum head big block vs steel head small block is about 15 lbs if I remember correctly.

09-03-2007, 02:39 PM	#3
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,400 Likes: 482 Liked 320 Times in 172 Posts	Re: Chevrolet Big Block vs Little Block 396/427 BBC weighs 685 iron head/ iron block/iron intake 454 about 675 iron/iron/iron SBC chev about 575 iron/iron/iron---take about 40 pounds off for alum int manifold or 535

09-04-2007, 08:00 AM	#4
Joe DeMarzo Senior Member Join Date: Oct 2002 Location: Mahopac, NY Posts: 666 Likes: 48 Liked 113 Times in 9 Posts	Re: Chevrolet Big Block vs Little Block Thank you __________________ Joe DeMarzo 1317 STK

09-04-2007, 10:53 AM	#5
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 1,996 Likes: 63 Liked 756 Times in 189 Posts	Re: Chevrolet Big Block vs Little Block ???? When I converted my '67 Camaro from a Z-28 (D/S) to an SS w/396 375 (A/S), the car weighed 180 lbs more when finished. That was in 1985 so the engines used stock rods, cranks, pistons and iron water pumps. Consider SS hood with cast louvers, SS emblems and 396 emblems added, but removal of factory 4-piston disc brakes w/booster replaced by factory drum brakes. Additional bars were added to the roll bar and 2" x 2" .083" subframe connectors were welded in at the same time. Maybe some additional weight in the headers. All food for thought.

09-04-2007, 11:53 AM	#6
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Chevrolet Big Block vs Little Block Dwight, I did the disc brake change on my 69 Z-28 in 1970. I used all the front suspension on a 6 cylinder donor car. My old faded memory says it was 38 lbs different in the disc set up & that included the lighter idler arm, drag link,pittman arm & manual steering box from the 6 cyl. car. __________________ Adger Smith (Former SS)