original engine question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bad_turbo · 01-20-2007, 11:16 PM

trying to figure out if the 350 in my '71 C20 is the original or a replacement. Not sure where to look on the motor. There is a number on the front of the block by the pass. head. Here it is: VO414TBC

Is there another number I will need to find to determine if it is the original motor? I just went through 2 cans of degreaser and 20 minutes of pressure washing to make sure it wasn't a 6 cylinder under all that crud!

1BadSS · 01-20-2007, 11:34 PM

Quote:

Originally Posted by bad_turbo

trying to figure out if the 350 in my '71 C20 is the original or a replacement. Not sure where to look on the motor. There is a number on the front of the block by the pass. head. Here it is: VO414TBC

Is there another number I will need to find to determine if it is the original motor? I just went through 2 cans of degreaser and 20 minutes of pressure washing to make sure it wasn't a 6 cylinder under all that crud!

TBC 1970 350 255 4 convfwd cabs, a/t
TBC 1970 350 255 4 m/t, 3 spd
TBC 1979 350 165 4 conv. cab, m/t,fed

Could be...

GREASEMONKEY72 · 01-21-2007, 12:02 AM

the block number is on the left side of the block on the very back behind the valve cover, that will give some info also

Smurfer643 · 01-21-2007, 12:05 AM

Go to www.mortec.com They have diagrams that show number locations and help you decoded some of the hibbity dibbity. I also called my local Chevy dealer for some info, they were very helpful.

Richard H. · 01-21-2007, 12:48 AM

[QUOTE=bad_turbo;1995495]trying to figure out if the 350 in my '71 C20 is the original or a replacement. Not sure where to look on the motor. There is a number on the front of the block by the pass. head. Here it is: VO414TBC

If ,That number is stamped on the top of the block that what is used to confirm the engine belongs in there with your Vin number.

68shortfleet · 01-21-2007, 01:55 AM

Anybody want to try another block stamping? Rear of block is 3970010, front of block looks like VO419TDG. I couldnt find the front number on mortec. Just the rear number. Was supposed to have been removed from a 72 K5.

Thanks
Jason

1BadSS · 01-21-2007, 02:08 AM

Quote:

Originally Posted by 68shortfleet

Anybody want to try another block stamping? Rear of block is 3970010, front of block looks like VO419TDG. I couldnt find the front number on mortec. Just the rear number. Was supposed to have been removed from a 72 K5.

Thanks
Jason

TDG 1972 350 175 4 conv,cab

71chevytruckguy · 01-21-2007, 03:58 AM

TDG 1972 350 M/t 175 4 K-10 & 20 chris.

http://www.nastyz28.com/gm-chevy-cod...s-suffix-7.php

Richard H. · 01-21-2007, 10:08 AM

First off I don't know where you find the info you are seeking without you having the original invoice, but the VO number is more or less the serial number not the 010 block number. The VO.... # would be on the build sheet and once that truck went out of warranty GM probably tossed them would be my guess.

01-20-2007, 11:16 PM	#1
bad_turbo turbo enthusiast Join Date: Jan 2004 Location: carmichael, ca. Posts: 1,826	original engine question trying to figure out if the 350 in my '71 C20 is the original or a replacement. Not sure where to look on the motor. There is a number on the front of the block by the pass. head. Here it is: VO414TBC Is there another number I will need to find to determine if it is the original motor? I just went through 2 cans of degreaser and 20 minutes of pressure washing to make sure it wasn't a 6 cylinder under all that crud! __________________ "But daddy, I didn't hit them all with a stick"...what my 6 year old tells me when I pick him up from school early for fighting "

01-21-2007, 12:02 AM	#3
GREASEMONKEY72 Registered User Join Date: Aug 2006 Location: Bakersfield,CA Posts: 7,893	Re: original engine question the block number is on the left side of the block on the very back behind the valve cover, that will give some info also __________________ -steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME

01-21-2007, 12:05 AM	#4
Smurfer643 Registered User Join Date: Jan 2007 Location: Washington Posts: 8	Re: original engine question Go to www.mortec.com They have diagrams that show number locations and help you decoded some of the hibbity dibbity. I also called my local Chevy dealer for some info, they were very helpful.

01-21-2007, 12:48 AM	#5
Richard H. Spanked once Join Date: Oct 2006 Location: Intheshop, Indiana Posts: 969	Re: original engine question [QUOTE=bad_turbo;1995495]trying to figure out if the 350 in my '71 C20 is the original or a replacement. Not sure where to look on the motor. There is a number on the front of the block by the pass. head. Here it is: VO414TBC If ,That number is stamped on the top of the block that what is used to confirm the engine belongs in there with your Vin number.

01-21-2007, 01:55 AM	#6
68shortfleet Registered User Join Date: Oct 2006 Location: Dundee, Oregon Posts: 311	Re: original engine question Anybody want to try another block stamping? Rear of block is 3970010, front of block looks like VO419TDG. I couldnt find the front number on mortec. Just the rear number. Was supposed to have been removed from a 72 K5. Thanks Jason

01-21-2007, 03:58 AM	#8
71chevytruckguy Registered User Join Date: Jul 2005 Location: Kernersville, NC Posts: 599	Re: original engine question TDG 1972 350 M/t 175 4 K-10 & 20 chris. http://www.nastyz28.com/gm-chevy-cod...s-suffix-7.php __________________ its a work in progess. 71 c-10 lwb, in the middle of frame off restoration. 69 c-10 swb, drag truck, 406 sbc, balanced, comp 292 cam, ported, polished, gasket matched, and bowl blended pro comp 210cc heads, 2.02/1.60 ferrea valves,1.6 roller rockers, re curved hei with msd 6al box, 2-step rev limter, accel 300+ wires, ported victor jr intake, holley 750 double pumper carb, dynomax 1 5/8 headers, 4 spd munci m-20 with super case and iron midplate, mr. gasket vertigate shifter, 5.38 pro gears with full spool, 33 spline moser axles and c-clip elimators, line-loc, 5 gal fuel cell, holley blue pump. 7.807 @ 88.37mph 1.60 60FT 80 g-20 van, tow rig, cammed 305, th350, 10 bolt 88 jeep wrangler, dd, 258, ax-15 swap, 4.5" lift, 33x12.50's, lockers, 3.55's

01-21-2007, 10:08 AM	#9
Richard H. Spanked once Join Date: Oct 2006 Location: Intheshop, Indiana Posts: 969	Re: original engine question First off I don't know where you find the info you are seeking without you having the original invoice, but the VO number is more or less the serial number not the 010 block number. The VO.... # would be on the build sheet and once that truck went out of warranty GM probably tossed them would be my guess.



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