350 or 305 ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

low 84 · 02-08-2002, 09:54 PM

I'm trying to decide what mods i want to do to my engine. I'm thinking all new top end (heads, cam, intake, carb). Before I do anything though, I want to be sure its a 350. I was told it was a '73 350ci when I bought it, but I was also told it had a 350th(turned out to be a 250th - boy was I suprised - evidently the pans look the same). Anyways if anyone knows a good way to tell (from the outside) I would appreciate it. By the way I'll also be replacing the tranny - thinking a TCI streetfighter. I just want to make sure its a 350ci before i sink any money into it. Oh yea, I tried the casting numbers but was unable to find any matches.

sorry for rambling
Keep truckin!

------------------
'84 1\2 ton swb, 350 5\7 drop
just sold '64 1\2 ton
4\4 drop with built 350 (my toy)

**MJN** · 02-09-2002, 10:04 AM

Send me the casting number and the number stamped in front of the right head. You might need to clean them up really good before reading them. I'll try and match one up for ya!

low 84 · 02-09-2002, 07:26 PM

MJN
thanks for offering your help. I'm posting this saturday night. I'll get the casting numbers tomorrow (i cant find out what i did with them when i wrote them down the last time) I'll post them sunday afternoon. Again i cant tell you how much i appreciate the help.

Keep truckin!

------------------
'84 1\2 ton swb, 350 5\7 drop
just sold '64 1\2 ton
4\4 drop with built 350 (my toy)

**MJN** · 02-09-2002, 10:46 PM

Hey isn't that what we're here for? Just gald I can help.

low 84 · 02-10-2002, 01:49 PM

OK here go's

there are two numbers stamped below the right head. the first one is T1230CRE. the second one is stamped in the opposite direction and it reads 10K152753 (note: the second "1" in this number might be something else or possibly a blank - it was really worn down and it was hard to tell). On the area above the oil filter the casting number was 085 (again this is an educated guess). On other engines I've seen casting numbers consiting of seven or more digits. I don't know if the other numbers on this block are worn off or if it only had three. I know this is'nt much to go on but any help is greatly appreciated!

------------------
'84 1\2 ton swb, 350 5\7 drop
just sold '64 1\2 ton
4\4 drop with built 350 (my toy)

**MJN** · 02-10-2002, 05:51 PM

Okay the T1230CRE means
CRE: 1970 Camaro, Chevelle, Nova 350 300hp RPO# L-47 single four barrel carb, connected to a TH350 tranny. Factory setup
T: Built in Tonawanda plant
1230: Day built December 30th
Hope this helps!

[This message has been edited by MJN (edited 02-10-2002).]

low 84 · 02-11-2002, 11:47 AM

Wow
I was expecting mid 70's 150 hp econo 350. This is good news! I guess i'll keep it and redo the top end. I think the reason I can't feel any power in it is because of that piece of junk turbo 250 thats in it. I'll be replacing that to.

MJN
thank you very much for the help

Keep truckin!

------------------
'84 1\2 ton swb, 350 5\7 drop
just sold '64 1\2 ton
4\4 drop with built 350 (my toy)

**MJN** · 02-11-2002, 05:46 PM

Hey no problem, I have to use those engine number books for something. I traced everything of ours and my friends. Glad I could help you out.

*Fast68Chevy* · 02-13-2002, 07:31 PM

good score ! a more desirable engine

------------------
Fleet as of today:
-'71 C10 CE10904 longstep, 1985 HD 350/CH465, 3.07 12 bolt leaf rear, texas truck
-72 4x4 chassis parts of all kinds f/s
-79 G20 350/th350 van-daily driver,
-lots of unused parts from 67-72 trucks and also for other years/models
Randy- Lincoln, IL

r68c30@hotmail.com
http://communities.msn.com/RandyR72K5

http://communities.msn.com/196772ChevroletCSTsforever

http://communities.msn.com/ChevyTrucksforever/

Im on MSN r72k5@hotmail.com and Yahoo Fastr68@yahoo.com

© RSS Enterprises 2002

02-08-2002, 09:54 PM	#1
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	350 or 305 ? I'm trying to decide what mods i want to do to my engine. I'm thinking all new top end (heads, cam, intake, carb). Before I do anything though, I want to be sure its a 350. I was told it was a '73 350ci when I bought it, but I was also told it had a 350th(turned out to be a 250th - boy was I suprised - evidently the pans look the same). Anyways if anyone knows a good way to tell (from the outside) I would appreciate it. By the way I'll also be replacing the tranny - thinking a TCI streetfighter. I just want to make sure its a 350ci before i sink any money into it. Oh yea, I tried the casting numbers but was unable to find any matches. sorry for rambling Keep truckin! ------------------ '84 1\2 ton swb, 350 5\7 drop just sold '64 1\2 ton 4\4 drop with built 350 (my toy) __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

02-09-2002, 10:04 AM	#2
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,051	Send me the casting number and the number stamped in front of the right head. You might need to clean them up really good before reading them. I'll try and match one up for ya! __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

02-09-2002, 07:26 PM	#3
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	MJN thanks for offering your help. I'm posting this saturday night. I'll get the casting numbers tomorrow (i cant find out what i did with them when i wrote them down the last time) I'll post them sunday afternoon. Again i cant tell you how much i appreciate the help. Keep truckin! ------------------ '84 1\2 ton swb, 350 5\7 drop just sold '64 1\2 ton 4\4 drop with built 350 (my toy) __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

02-09-2002, 10:46 PM	#4
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,051	Hey isn't that what we're here for? Just gald I can help. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

02-10-2002, 01:49 PM	#5
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	OK here go's there are two numbers stamped below the right head. the first one is T1230CRE. the second one is stamped in the opposite direction and it reads 10K152753 (note: the second "1" in this number might be something else or possibly a blank - it was really worn down and it was hard to tell). On the area above the oil filter the casting number was 085 (again this is an educated guess). On other engines I've seen casting numbers consiting of seven or more digits. I don't know if the other numbers on this block are worn off or if it only had three. I know this is'nt much to go on but any help is greatly appreciated! ------------------ '84 1\2 ton swb, 350 5\7 drop just sold '64 1\2 ton 4\4 drop with built 350 (my toy) __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

02-10-2002, 05:51 PM	#6
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,051	Okay the T1230CRE means CRE: 1970 Camaro, Chevelle, Nova 350 300hp RPO# L-47 single four barrel carb, connected to a TH350 tranny. Factory setup T: Built in Tonawanda plant 1230: Day built December 30th Hope this helps! [This message has been edited by MJN (edited 02-10-2002).] __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

02-11-2002, 11:47 AM	#7
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	Wow I was expecting mid 70's 150 hp econo 350. This is good news! I guess i'll keep it and redo the top end. I think the reason I can't feel any power in it is because of that piece of junk turbo 250 thats in it. I'll be replacing that to. MJN thank you very much for the help Keep truckin! ------------------ '84 1\2 ton swb, 350 5\7 drop just sold '64 1\2 ton 4\4 drop with built 350 (my toy) __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

02-11-2002, 05:46 PM	#8
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,051	Hey no problem, I have to use those engine number books for something. I traced everything of ours and my friends. Glad I could help you out. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

02-13-2002, 07:31 PM	#9
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	good score ! a more desirable engine ------------------ Fleet as of today: -'71 C10 CE10904 longstep, 1985 HD 350/CH465, 3.07 12 bolt leaf rear, texas truck -72 4x4 chassis parts of all kinds f/s -79 G20 350/th350 van-daily driver, -lots of unused parts from 67-72 trucks and also for other years/models Randy- Lincoln, IL r68c30@hotmail.com http://communities.msn.com/RandyR72K5 http://communities.msn.com/196772ChevroletCSTsforever http://communities.msn.com/ChevyTrucksforever/ Im on MSN r72k5@hotmail.com and Yahoo Fastr68@yahoo.com © RSS Enterprises 2002

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