What type of block - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tim m · 10-26-2003, 04:44 PM

Is there any way to find out if I have 2 or 4 bolt main, wihtout taking the oil pan off?

cableguy0 · 10-26-2003, 04:44 PM

usually the only sure fire dead on way is to pull the pan and look

Green72GMC · 10-26-2003, 07:34 PM

get the block # and go to http://www.mortec.com/castnum.htm

cableguy0 · 10-26-2003, 08:02 PM

but even still some casting numbers could be either 2 or 4 bolt the only sure fire way is to pull the pan. if the engine is running good or in a truck it doesnt matter much anyways a 2 bolt is plenty strong for about any street bound motor. and in some cases the 2 bolt is stronger than the 4 bolt

Scott Johnson · 10-26-2003, 09:49 PM

I think if the last 4 numbers are 0010, it`s a four bolt.

Z28Owner · 10-26-2003, 09:53 PM

My spare 350 is 0010 and its a 2 bolt, but you can get a 2 bolt Splayed at the machine shop and its supposedly stronger than a 4 bolt.

crazy longhorn · 10-26-2003, 10:25 PM

3970010 is a very common block, and can be 2 or 4 bolt.....the 1 in my Longhorn is a 2 bolt block(also 10/20 high nickel). i also have 2 spare blocks with the same casting # , & they are also 2 bolt blocks. the best way to know for sure, is pull the pan ,as cableguy suggested

i also agree that the 2 bolt block is plenty strong for a hot street application.....with addition of a set of main studs, the 2 bolt block should handle in the range of 450hp. for the ultimate 4 bolt, a 2 bolt with a splayed cap conversion is the ticket. crazyL

bigjimzlll · 10-26-2003, 10:26 PM

Ive owned 4 0010 blocks...all were 2 bolts

cableguy0 · 10-26-2003, 10:36 PM

i will let you guys know how much a bolt will handle when i get the brodix track 1's and switch to a roller cam setup

motor will be making over 500 ponies on the motor then im gonna spray the he!! out of it so i will let y'all know in a few months when im finished how long it takes to break the 2 bolt and snap the crank in half

Scott Johnson · 10-26-2003, 11:19 PM

Guess I got lucky, my 0010 is a 4 bolt. I was told that 0010`s were all 4 bolts, wan`t sure that`s why I said "I think".

bigjimzlll · 10-26-2003, 11:43 PM

yea..I think im just unlucky with the 0010 blocks..I heard over half have 4 bolts

Scott Johnson · 10-26-2003, 11:47 PM

I guess cableguy is right, the only sure way to tell is remove the oil pan.

cableguy0 · 10-26-2003, 11:49 PM

yea jim i have had 3 010 block that are 2 bolt and in the machine shop i work in have seen who knows how many that are also 2 bolt so im thinking its less than half that are 4 bolts

10-26-2003, 04:44 PM	#1
tim m Registered User Join Date: Mar 2001 Location: Gilbert Az Posts: 286	What type of block Is there any way to find out if I have 2 or 4 bolt main, wihtout taking the oil pan off? __________________ 1970 k10 1971 C10 Gilbert Az

10-26-2003, 04:44 PM	#2
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	usually the only sure fire dead on way is to pull the pan and look __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-26-2003, 07:34 PM	#3
Green72GMC Registered User Join Date: Apr 2003 Location: Deville, Louisiana Posts: 293	get the block # and go to http://www.mortec.com/castnum.htm __________________ 1972 GMC SWB, 305 powered 1980 diesel VW pickup, Needs a Heart Transplant 1997 Toyota Taco The Second Amendment is in place incase they ignore the others.

10-26-2003, 08:02 PM	#4
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	but even still some casting numbers could be either 2 or 4 bolt the only sure fire way is to pull the pan. if the engine is running good or in a truck it doesnt matter much anyways a 2 bolt is plenty strong for about any street bound motor. and in some cases the 2 bolt is stronger than the 4 bolt __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-26-2003, 09:49 PM	#5
Scott Johnson Junior Member Join Date: Feb 2003 Location: Louisiana Posts: 281	I think if the last 4 numbers are 0010, it`s a four bolt. __________________ 71 C10 Step Daily Driver 72 K10 Suburban Work in Progress www.louisianaclassictruckclub.com

10-26-2003, 09:53 PM	#6
Z28Owner ......................... Join Date: Nov 2001 Location: benton, ky Posts: 288	My spare 350 is 0010 and its a 2 bolt, but you can get a 2 bolt Splayed at the machine shop and its supposedly stronger than a 4 bolt. __________________ 1971 LWB Chevy C-10 350/350 3:42 eaton

10-26-2003, 10:25 PM	#7
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	3970010 is a very common block, and can be 2 or 4 bolt.....the 1 in my Longhorn is a 2 bolt block(also 10/20 high nickel). i also have 2 spare blocks with the same casting # , & they are also 2 bolt blocks. the best way to know for sure, is pull the pan ,as cableguy suggested i also agree that the 2 bolt block is plenty strong for a hot street application.....with addition of a set of main studs, the 2 bolt block should handle in the range of 450hp. for the ultimate 4 bolt, a 2 bolt with a splayed cap conversion is the ticket. crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

10-26-2003, 10:26 PM	#8
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	Ive owned 4 0010 blocks...all were 2 bolts __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

10-26-2003, 10:36 PM	#9
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	i will let you guys know how much a bolt will handle when i get the brodix track 1's and switch to a roller cam setup motor will be making over 500 ponies on the motor then im gonna spray the he!! out of it so i will let y'all know in a few months when im finished how long it takes to break the 2 bolt and snap the crank in half __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-26-2003, 11:19 PM	#10
Scott Johnson Junior Member Join Date: Feb 2003 Location: Louisiana Posts: 281	Guess I got lucky, my 0010 is a 4 bolt. I was told that 0010`s were all 4 bolts, wan`t sure that`s why I said "I think". __________________ 71 C10 Step Daily Driver 72 K10 Suburban Work in Progress www.louisianaclassictruckclub.com

10-26-2003, 11:43 PM	#11
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	yea..I think im just unlucky with the 0010 blocks..I heard over half have 4 bolts __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

10-26-2003, 11:47 PM	#12
Scott Johnson Junior Member Join Date: Feb 2003 Location: Louisiana Posts: 281	I guess cableguy is right, the only sure way to tell is remove the oil pan. __________________ 71 C10 Step Daily Driver 72 K10 Suburban Work in Progress www.louisianaclassictruckclub.com

10-26-2003, 11:49 PM	#13
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	yea jim i have had 3 010 block that are 2 bolt and in the machine shop i work in have seen who knows how many that are also 2 bolt so im thinking its less than half that are 4 bolts __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.



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