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#1 |
-Chris
![]() Join Date: Sep 2002
Location: Moyock, NC
Posts: 622
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SBC to BBC Front Suspension
I've read about 20 past posts on this subject, but get conflicting information, so I'm gonna ask again! Sorry for resurfacing this subject.
I have a 70 c-10 that had a small block in it. I put a 3/5 drop on it with new springs about 5 years ago (so the springs are relatively new). I am now going to a 496BBC and also I'm putting a Willwod disc brake kit on it with 2" drop spindles. Technically, the drop will now be a 5/5 going forward. I want a slight rake to the truck, but not a lot. Questions: 1) Do you think I should swap the front springs to a 2" drop BBC spring? Or, can I leave it alone and expect a good ride with it with the SBC springs? 2) What do you think the rake will be with a 5/5 drop? Just curious how much I will need to bring the rear down. As always with you guys, thanks in advance.
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1970 Chevy C-10 P/U, Shortbed, Fleetside - 5/7 drop, 496, TH400, 12 bolt. BUILD THREAD - http://67-72chevytrucks.com/vboard/s...d.php?t=404481 2012 F250 Super Duty P/U - intake, exhaust, tuner, 4" lift with 35's 2017 Chevy Suburban (Wifes Car) - Fully Loaded & Stock "Some people spend an entire lifetime wondering if they made a difference in the world. But, the Marines don't have that problem." Ronald Reagan, President of the United States; 1985 |
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#2 |
-Chris
![]() Join Date: Sep 2002
Location: Moyock, NC
Posts: 622
|
Re: SBC to BBC Front Suspension
Just realized I didn't put this in the suspension forum. Sorry mods.....
__________________
1970 Chevy C-10 P/U, Shortbed, Fleetside - 5/7 drop, 496, TH400, 12 bolt. BUILD THREAD - http://67-72chevytrucks.com/vboard/s...d.php?t=404481 2012 F250 Super Duty P/U - intake, exhaust, tuner, 4" lift with 35's 2017 Chevy Suburban (Wifes Car) - Fully Loaded & Stock "Some people spend an entire lifetime wondering if they made a difference in the world. But, the Marines don't have that problem." Ronald Reagan, President of the United States; 1985 |
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#3 |
Registered User
Join Date: Dec 2009
Location: killeen tx 76542
Posts: 193
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Re: SBC to BBC Front Suspension
I did almost the exact swap, except mines a 508 BBC from a small block 355.
i had to change the springs out, the 3" drop springs for SBC were sitting on the bump stops. I have the CPP modular spindles with 2.5" drop and CCP 12" big brake kit (at least it was the big brake kit 5 years ago when I bought it). Could not drive with SBC springs in place, once I swapped in the 2" BBC springs, yielded almost same drop as before, but with suspension travel now and able to drive it. post some pics and good luck
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A C Ward Retired US Army 66 El Camino 67 SWB underwent major Surgery- http://67-72chevytrucks.com/vboard/s...d.php?t=776475 |
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#4 |
-Chris
![]() Join Date: Sep 2002
Location: Moyock, NC
Posts: 622
|
Re: SBC to BBC Front Suspension
Thanks for the info Sir. I went ahead and ordered the 2" BB springs.
__________________
1970 Chevy C-10 P/U, Shortbed, Fleetside - 5/7 drop, 496, TH400, 12 bolt. BUILD THREAD - http://67-72chevytrucks.com/vboard/s...d.php?t=404481 2012 F250 Super Duty P/U - intake, exhaust, tuner, 4" lift with 35's 2017 Chevy Suburban (Wifes Car) - Fully Loaded & Stock "Some people spend an entire lifetime wondering if they made a difference in the world. But, the Marines don't have that problem." Ronald Reagan, President of the United States; 1985 |
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#5 |
Senior Member
![]() Join Date: Jan 2009
Location: Logansport,In
Posts: 546
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Re: SBC to BBC Front Suspension
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#6 |
-Chris
![]() Join Date: Sep 2002
Location: Moyock, NC
Posts: 622
|
Re: SBC to BBC Front Suspension
Performanceonline.com
I ordered an adjustable rear track bar from them too.
__________________
1970 Chevy C-10 P/U, Shortbed, Fleetside - 5/7 drop, 496, TH400, 12 bolt. BUILD THREAD - http://67-72chevytrucks.com/vboard/s...d.php?t=404481 2012 F250 Super Duty P/U - intake, exhaust, tuner, 4" lift with 35's 2017 Chevy Suburban (Wifes Car) - Fully Loaded & Stock "Some people spend an entire lifetime wondering if they made a difference in the world. But, the Marines don't have that problem." Ronald Reagan, President of the United States; 1985 |
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#7 |
Senior Member
![]() Join Date: Jan 2009
Location: Logansport,In
Posts: 546
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Re: SBC to BBC Front Suspension
Ok, thanks.
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#8 |
Florida Edition
![]() ![]() Join Date: Oct 2010
Location: Fruitland Park, FL
Posts: 4,025
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Re: SBC to BBC Front Suspension
I'm too late for this to help but factory 1/2 ton big blocks came with stock 3/4 ton front springs. I ordered new stock 3/4's and cut one half of a coil off along with 2-1/2" drop spindles, that and 6" drop rear coils, adjustable track bar, stock shocks and SHOCK RELOCATOR KIT got me about the perfect stance on 15" wheels.
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70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394 |
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#9 |
Senior Member
![]() Join Date: Nov 2008
Location: bristol,CT
Posts: 580
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Re: SBC to BBC Front Suspension
renokeene. is that gm factory 3/4 ton springs with a small block?
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#10 |
Senior Member
![]() Join Date: Feb 2010
Location: Falls City, Nebraska "100 Miles From Nowhere"
Posts: 2,219
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Re: SBC to BBC Front Suspension
I'm running factory SBC coils with 1/2 a coil cut off, also 2-1/2" drop spindles, itty bitty 439 ci BBC LS killer motor...No issues, steers and rides like a Vette...
![]() Skinny MT drag tires and wheels provide plenty of suspension clearance.
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" ![]() "Be American, Buy American" ![]() |
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#11 |
Senior Member
![]() Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,283
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Re: SBC to BBC Front Suspension
I went from a 250 to a 402 and did not change springs. I cannot tell the difference in ride height and it handles the same. Stock height though, not dropped.
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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