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Proven 8 second SBC 421ci short block

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Old Oct 12, 2006 | 07:44 PM
  #1  
1BAD86Z's Avatar
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Joined: Mar 2001
Posts: 489
From: ROSEVILLE , MI
Proven 8 second SBC 421ci short block

This short block assembly has just over 80 passes on the NOS and maybe 25 on the motor. You should get another season out of it with 250 or less shot of NOS. I am selling my short block from the pistons down to the oil pan, it contains the following,
Steph's aluminum oil pan with melling HP,HV pump
Howards Extreme crank 3.875 stroke
Oliver billet 6" rods with ARP 3.5 bolts
Tool steel pins and TNT
NOS rings 1/16 1/16 3/16
Diamond Pistons I believe party number 15556
4.155 bore with 3.875 stroke .100+ dome
Crane cams 4-7 swap grind number 11R001305
I= .670 E= .688 with 1.50 rocker
I= 278.0 E= 294.0 @.050 duration
I= 306.0 E= 336.0 advertised
114.5 lobe seperation
Crane lifters included
Cloys hex-adjust timing chain with cam button and chrome timing cover
Block is one if Jelly's block's that was preped while he was still at Diamond and contains the following,
Bore 4.160
9.005" deck
Lifter bores bushed with bronz bushings
ARP head studs with 12 point 1/2 nuts

Compression was 14.7-1 with 60cc Dart Pro 1 23 degree heads.

I am selling this as an assembly until the end of this year. If it does not sell I will disassemble and part out.
If you had to build this it would be well over $7500.00, I am asking $4575.00 firm.

Contact me at,
Cell (586) 630-1098
Business (586) 218-7140
Scott K.
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Old Oct 14, 2006 | 09:38 PM
  #2  
Mike94ZLT1's Avatar
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Joined: Oct 2000
Posts: 1,665
From: Livonia, Mi
Re: Proven 8 second SBC 421ci short block

Originally Posted by 1BAD86Z
This short block assembly has just over 80 passes on the NOS and maybe 25 on the motor. You should get another season out of it with 250 or less shot of NOS. I am selling my short block from the pistons down to the oil pan, it contains the following,
Steph's aluminum oil pan with melling HP,HV pump
Howards Extreme crank 3.875 stroke
Oliver billet 6" rods with ARP 3.5 bolts
Tool steel pins and TNT
NOS rings 1/16 1/16 3/16
Diamond Pistons I believe party number 15556
4.155 bore with 3.875 stroke .100+ dome
Crane cams 4-7 swap grind number 11R001305
I= .670 E= .688 with 1.50 rocker
I= 278.0 E= 294.0 @.050 duration
I= 306.0 E= 336.0 advertised
114.5 lobe seperation
Crane lifters included
Cloys hex-adjust timing chain with cam button and chrome timing cover
Block is one if Jelly's block's that was preped while he was still at Diamond and contains the following,
Bore 4.160
9.005" deck
Lifter bores bushed with bronz bushings
ARP head studs with 12 point 1/2 nuts

Compression was 14.7-1 with 60cc Dart Pro 1 23 degree heads.

I am selling this as an assembly until the end of this year. If it does not sell I will disassemble and part out.
If you had to build this it would be well over $7500.00, I am asking $4575.00 firm.

Contact me at,
Cell (586) 630-1098
Business (586) 218-7140
Scott K.
__________________

A business phone?! Well look at you Mr. Fancy Pants! I need a price on some gears for my Cherokee when you get a chance, I'm putting some 33" tires on there and I'm gonna need a little more gearing. No clue what I want, I'll trust your judgement on that as usual.
Old Oct 14, 2006 | 10:46 PM
  #3  
1BAD86Z's Avatar
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Joined: Mar 2001
Posts: 489
From: ROSEVILLE , MI
Re: Proven 8 second SBC 421ci short block

Originally Posted by Mike94ZLT1
A business phone?! Well look at you Mr. Fancy Pants! I need a price on some gears for my Cherokee when you get a chance, I'm putting some 33" tires on there and I'm gonna need a little more gearing. No clue what I want, I'll trust your judgement on that as usual.

Probably 4.10 ratio's would be fine but if you plan on putting 35" later on 4.56's would be the way to go. Figure $160.00 per axle for gears, $90.00 per axle for kits and $75.00 per axle for cases since most trucks come with 3.08 ratio's and to go to 4.10's the offset is different.
Old Oct 17, 2006 | 02:13 PM
  #4  
PhantomTA's Avatar
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Joined: May 1999
Posts: 2,881
From: Chelsea, MI
Re: Proven 8 second SBC 421ci short block

250.00
Old Oct 17, 2006 | 07:16 PM
  #5  
1BAD86Z's Avatar
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Joined: Mar 2001
Posts: 489
From: ROSEVILLE , MI
Re: Proven 8 second SBC 421ci short block

Originally Posted by PhantomTA
250.00

Mulitply that by 18...
Old Oct 18, 2006 | 05:50 PM
  #6  
Rodrigues's Avatar
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Joined: Mar 2002
Posts: 1,842
From: Bloomfield Hills MI
Re: Proven 8 second SBC 421ci short block

Turbo?!
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