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70rs/ss · 10-31-2008, 02:59 PM

TWF 77 350 Truck 165 LS-9 TH 350 4-Brl
TWF 79 305 Truck 175 L-03 TBI

That wasn't too hard? Want the link?? I figured you would, here ya go!:

http://www.chevymania.com/partsid/

The suffix code is usually only 3 letters, so I just used the last 3, but if I use the middle three I got:

CTW 76 400 Impala 175 LT-4 T-H 400 4-Brl
CTW 78 305 Buick 145 LG-3 TH 350 2-Brl Century, Regal

But I am about 99% sure it is the last 3 so it is either a 350 or 305, and the casting date will be the 100% for sure way to determine which one it is.

10-31-2008, 02:59 PM	#4
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,270	Re: Help me decode my engine TWF 77 350 Truck 165 LS-9 TH 350 4-Brl TWF 79 305 Truck 175 L-03 TBI That wasn't too hard? Want the link?? I figured you would, here ya go!: http://www.chevymania.com/partsid/ The suffix code is usually only 3 letters, so I just used the last 3, but if I use the middle three I got: CTW 76 400 Impala 175 LT-4 T-H 400 4-Brl CTW 78 305 Buick 145 LG-3 TH 350 2-Brl Century, Regal But I am about 99% sure it is the last 3 so it is either a 350 or 305, and the casting date will be the 100% for sure way to determine which one it is. Last edited by 70rs/ss; 10-31-2008 at 03:03 PM.