455 code identification
#1
455 code identification
Hello everyone,
I received a 455 (in pieces) with the 442 I bought and I need some help decoding the numbers and finding the specs. The block has a number of 396021Fa. The heads are "J" heads 2791091. It's in pretty good shape so I would like to have it rebuilt. Any help would be appreciated.
Thanks guys,
Dave
I received a 455 (in pieces) with the 442 I bought and I need some help decoding the numbers and finding the specs. The block has a number of 396021Fa. The heads are "J" heads 2791091. It's in pretty good shape so I would like to have it rebuilt. Any help would be appreciated.
Thanks guys,
Dave
#3
Most guys on here will tell you not to use the J heads ,the block code is the same for all 455's from 68-76 ,the little "a" beside the F states that it has no provision for a Z bar for a std transmission.Now for the pics ,when you go to post click on the ADVANCED button and go to MANAGE ATTACHMENTS and then a window will pop up and then you can click to add up to 5 pics all at the same time once you have chosen the pics off your computer .Try it
#4
Thanks for the engine info.
[QUOTE=61reoldsman;when you go to post click on the ADVANCED button and go to MANAGE ATTACHMENTS and then a window will pop up and then you can click to add up to 5 pics all at the same time once you have chosen the pics off your computer .Try it [/QUOTE]
I've tried that several times and it will only let me load one pic. I'll have to keep on trying I guess.
Thanks,
Dave
[QUOTE=61reoldsman;when you go to post click on the ADVANCED button and go to MANAGE ATTACHMENTS and then a window will pop up and then you can click to add up to 5 pics all at the same time once you have chosen the pics off your computer .Try it [/QUOTE]
I've tried that several times and it will only let me load one pic. I'll have to keep on trying I guess.
Thanks,
Dave
#5
the j heads are smog heads. if you look on the block on driver side just below were the head would sit there should be a tab with numbers stamped. it will give you the year and the last few numbers of the vin from witch it came from
http://www.442.com/oldsfaq/ofeng.htm#Engines here is a good site to do some research
http://www.442.com/oldsfaq/ofeng.htm#Engines here is a good site to do some research
#6
Fa & 4 speed is possible
Most guys on here will tell you not to use the J heads ,the block code is the same for all 455's from 68-76 ,the little "a" beside the F states that it has no provision for a Z bar for a std transmission.Now for the pics ,when you go to post click on the ADVANCED button and go to MANAGE ATTACHMENTS and then a window will pop up and then you can click to add up to 5 pics all at the same time once you have chosen the pics off your computer .Try it
#8
It's a 73-77 455.They are all about the same from those years.The shortblock is a good foundation to build from.If you wanted to get the correct heads to match your car,you could get some G-heads.Are you wanting a stock or mild rebuild?
#9
Hey Brian how deep of a dish in the pistons did those 73-77 motors come with ?Much difference to the earlier years ?Would those G heads push the compression ratio up any more than the heads the 73-77 motors came with? Could a mild rebuild with a little bigger camshaft profile achieve 1 hp per cubic inch ?I think Dave might be looking to do want I want to do in the near future although he has the motor already and I don't.Thanks
#10
The pistons in the 73-76 455's were deep enough to put your cereal in.If you wanted to make a difference with a stock,factory piston,you would want to find a set of 68-70 455 pistons.Even the 68-70 2bbl pistons had a much smaller dish.I have a few of these from a 70 455,but not a full set.
The G-heads will not change the compression,compared to the J-heads.The only way to boost compression is to cut a decent amount from the head,which I wouldn't recommend,or getting a piston with a much smaller dish.
The G-heads will not change the compression,compared to the J-heads.The only way to boost compression is to cut a decent amount from the head,which I wouldn't recommend,or getting a piston with a much smaller dish.
#13
I guess it depends on what direction you want to go in ,stock or modified .You could probably reuse the rods in a stock rebuild .Lots of guys on here like 507olds,cutlassfi ,etc. can guide you through the direction you want to go in.There is sooo.. many choices that you need to make it's important to have someone with experience to help with making the right choices for your build,and a good reputable machine shop.Just my .02 ,I know for me that when I go to the 455 engine that I want I'll be asking these guys tons of questions.
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January 2nd, 2010 03:30 PM