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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: boyer61 on October 29, 2011, 05:42:35 pm

Title: How to tell if you have a 305 or 350.
Post by: boyer61 on October 29, 2011, 05:42:35 pm: I know there are casting numbers on the rear of the drivers side on the block. What the easiest way to see it? I tried from the top, I took some pictures near the oil pressure switch area, doesnt look anything like casting numbers, where are they exactly?
Title: Re: How to tell if you have a 305 or 350.
Post by: zieg85 on October 29, 2011, 05:48:20 pm: http://www.nastyz28.com/sbchevy/sblock.php

is the source I use....
Title: Re: How to tell if you have a 305 or 350.
Post by: boyer61 on October 29, 2011, 05:57:28 pm: If im reading this right the #s are on the front of the passengers side??
Title: Re: How to tell if you have a 305 or 350.
Post by: zieg85 on October 29, 2011, 06:06:33 pm: Quote from: boyer61 on October 29, 2011, 05:57:28 pm
If im reading this right the #s are on the front of the passengers side??

The casting numbers are on back but the numbers that should give you the most info is behind the alternator on the engine block pad. Look through and it should tell you exactly what your engine came from.
Title: Re: How to tell if you have a 305 or 350.
Post by: boyer61 on October 29, 2011, 06:07:41 pm: I only seen 1 set of #s 1222CPY
Title: Re: How to tell if you have a 305 or 350.
Post by: zieg85 on October 29, 2011, 06:10:06 pm: CPY 1977 305 LG3 U 145 2 F A X

Looks like it's a 1977 305
Title: Re: How to tell if you have a 305 or 350.
Post by: boyer61 on October 29, 2011, 06:14:09 pm: Just seen that. Guy i bought it from said it was an 85.. What does FAX mean or stand for?
Title: Re: How to tell if you have a 305 or 350.
Post by: zieg85 on October 29, 2011, 06:19:52 pm: Quote from: boyer61 on October 29, 2011, 06:14:09 pm
Just seen that. Guy i bought it from said it was an 85.. What does FAX mean or stand for?

It could have come in a Camaro, Nova or Chevelle in 1977
Title: Re: How to tell if you have a 305 or 350.
Post by: Jeffroe2114 on August 13, 2013, 11:58:25 am: The # I pulled from behind the alternator was 171470020 K03 CRA.
Title: Re: How to tell if you have a 305 or 350.
Post by: zieg85 on August 13, 2013, 03:59:56 pm: Quote from: Jeffroe2114 on August 13, 2013, 11:58:25 am
The # I pulled from behind the alternator was 171470020 K03 CRA.

CRA 1977 305 LG3 U 145 2
Title: Re: How to tell if you have a 305 or 350.
Post by: fischebc on September 09, 2013, 02:24:08 am: I'm having the same issue trying to figure out what's in my 85 Chevy Silverado 4X4. The numbers on the casting are V0526CHS?
Title: Re: How to tell if you have a 305 or 350.
Post by: zieg85 on September 09, 2013, 06:27:39 am: Quote from: fischebc on September 09, 2013, 02:24:08 am
I'm having the same issue trying to figure out what's in my 85 Chevy Silverado 4X4. The numbers on the casting are V0526CHS?

CHS 1978 350 auto trans. LM1 L 170 4 Camaro
Title: Re: How to tell if you have a 305 or 350.
Post by: fischebc on September 09, 2013, 01:30:03 pm: Quote from: zieg85 on September 09, 2013, 06:27:39 am
Quote from: fischebc on September 09, 2013, 02:24:08 am
I'm having the same issue trying to figure out what's in my 85 Chevy Silverado 4X4. The numbers on the casting are V0526CHS?

CHS 1978 350 auto trans. LM1 L 170 4 Camaro

Thank you sir, just wanted to verify that I was looking at the right plate. The one behind the alternator? There is another set of numbers but no letters on this one 16J308637?