swapping 454 in place of 6 cyl...how much drop with stock springs? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

superchevy · 03-22-2005, 06:22 PM

I'm just wondering how much the front end will drop on my '81 when I swap the 454 in place of the 250 six cylinder?
Any ideas?
SC

Tx Firefighter · 03-23-2005, 08:37 AM

Casey, it's not exactly the same truck, but my 70 model dropped about an inch when I went from inline 6 to 454. I also went to power steering, power brakes, and auto transmission at the same time.

superchevy · 03-23-2005, 10:15 AM

Hi Kevin, yeah, I'm thinking about an inch drop as well. Combined with the 2 1/2" drop spindles...probably about a 3 1/2" drop total.
SC

**Captkaos** · 03-23-2005, 07:36 PM

I might go and inch becuase the springs are over 20 years old.

03-22-2005, 06:22 PM	#1
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	swapping 454 in place of 6 cyl...how much drop with stock springs? I'm just wondering how much the front end will drop on my '81 when I swap the 454 in place of the 250 six cylinder? Any ideas? SC __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

03-23-2005, 08:37 AM	#2
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Casey, it's not exactly the same truck, but my 70 model dropped about an inch when I went from inline 6 to 454. I also went to power steering, power brakes, and auto transmission at the same time. __________________ I'm on the Instagram- @Gearhead_Kevin

03-23-2005, 10:15 AM	#3
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Hi Kevin, yeah, I'm thinking about an inch drop as well. Combined with the 2 1/2" drop spindles...probably about a 3 1/2" drop total. SC __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

03-23-2005, 07:36 PM	#4
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	I might go and inch becuase the springs are over 20 years old. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com



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