Big Block Engine Decode? HELP!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

donzoidz · 08-22-2007, 10:05 AM

Hey guys I need some help trying to decode a big block chevy. I cant get to the back numbers it was a swap into a 64 truck and it is right up against the firewall. I have the numbers off the front of the block boss in front of the head if it helps. T 121 IIV 18L131634 Any help would be greatly appreciated. Please send your replies to socalhotrodz@aol.com Thanks so much.

1968SWBBigBlock · 08-22-2007, 10:10 AM

That does not look like a good number to me.

Livrat · 08-22-2007, 11:40 AM

Is it possible that the third to the last letter is a "1" instead of an "I"?
If its "IV" instead, it appears to be a 1965 Impala 325HP 396 that came with a T400 behind it. does it have a "cannister" oil filter assembly or an aluminum adapter under a spin on oil filter?

**Ricks1971** · 08-22-2007, 03:12 PM

If ya have some casting numbers you can tell alot better.
http://www.mortec.com/bbc.htm

08-22-2007, 10:05 AM	#1
donzoidz Registered User Join Date: Aug 2006 Location: redding,ca Posts: 3	Big Block Engine Decode? HELP!!! Hey guys I need some help trying to decode a big block chevy. I cant get to the back numbers it was a swap into a 64 truck and it is right up against the firewall. I have the numbers off the front of the block boss in front of the head if it helps. T 121 IIV 18L131634 Any help would be greatly appreciated. Please send your replies to socalhotrodz@aol.com Thanks so much.

08-22-2007, 10:10 AM	#2
1968SWBBigBlock Active Member Join Date: Oct 2006 Location: Ohio Posts: 1,643	Re: Big Block Engine Decode? HELP!!! That does not look like a good number to me. __________________ 1968 SWB 454 + .040, 490HP x 540 FT pounds of Torque 10-1 Kb Forged pistons, recon rods w/ ARP wave loc bolts 781 heads Ported with 2.19/1.88 SSTvalves Lunati 60204 cam, Micro Trol lifters, Ported Edelbrock Performer Rpm manifold armor coated, Pertronix Triple Strike Ignition Holley 770 Street Avenger carb,Headers armor coated Built by Watson Ruppel Performance in Sarahsville Ohio. Hardshift Tranny Built Turbo 350,TSI 10" 3000 stall 12 Bolt Eaton Posi 4.10 Richmond Gears moser axles 18.5" x 31" Hoosier Pro Street Radials ET Classic 5 Wheels - polished Power Steering, Power Brakes,Disc Brakes,Tach & Gauge Dash, Tilt,Factory Air (gone) Custom Paint & Body Work Special thanks to my wife, my son and my money tree

08-22-2007, 11:40 AM	#3
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	Re: Big Block Engine Decode? HELP!!! Is it possible that the third to the last letter is a "1" instead of an "I"? If its "IV" instead, it appears to be a 1965 Impala 325HP 396 that came with a T400 behind it. does it have a "cannister" oil filter assembly or an aluminum adapter under a spin on oil filter?

08-22-2007, 03:12 PM	#4
Ricks1971 Senior Member Join Date: Mar 2006 Location: Clarkrange Tennessee Posts: 1,787	Re: Big Block Engine Decode? HELP!!! If ya have some casting numbers you can tell alot better. http://www.mortec.com/bbc.htm



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