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1980 301 to 350 swap

Posted By: 1980azbird On: 01-02-2008 @ 09:51:29         Reply | Edit
Hi all!

Just bought a 1980 Formula 301 non turbo and am wondering if a 350 or 400 from an earlier Pontiac would fit without a lot of mods?

Any help would be appreciated.

I used to have a 1971 about 20 years ago and finally got another one!

Thanks!

Brian

Posted By: 428bird On: 10-31-2005 @ 12:18:18     Reply | Top | Edit
I believe that you can bolt in any Pontiac motor from 1970-1981 using the existing motor mounts and no modifications. It should bolt right up to the trans.

Posted By: dan On: 10-31-2005 @ 18:33:39     Reply | Top | Edit
^yup...what he said..
--
98 formula m6
99 firebird 3.8 auto (wifemobile)
89 formula 305tbi m5 PARTING OUT

Posted By: FlyingArrow On: 10-31-2005 @ 19:28:04     Reply | Top | Edit
Some of the pre-1970 blocks don't allow for the proper motor mount location to allow them to be easily mounted in a second generation F-body. Other than that it is a easy swap so just make sure you get a engine with the "5" motor mount bolt holes on each side of the block.

Posted By: 1980azbird On: 11-02-2005 @ 17:59:38     Reply | Top | Edit
Ok, thanks

But...my state is getting worse and worse on emissions testing.

I can't get rid of the cat and other emissions garbage like I would prefer. If I drop in a 350 and bolt up all the same exhaust and other emissions stuff will it still be OK? Realizing the performance loss of course.

Posted By: dan On: 11-02-2005 @ 20:54:38     Reply | Top | Edit
you'd hafta make custom brackets in order to put the emissions components on the 350....been tehre..done that..not worth it.
--
98 formula m6
99 firebird 3.8 auto (wifemobile)
89 formula 305tbi m5 PARTING OUT

Posted By: 1980azbird On: 11-02-2005 @ 21:10:11     Reply | Top | Edit
Thanks......should have bought an older one

Posted By: dan On: 11-03-2005 @ 11:16:03     Reply | Top | Edit
yup..i sold my 81 for just about that same reason..car was really really nice..but i'd hafta put classic/antique tags on it just to get it legal with a decent motor..wasn't worth the extra hassle of making brackets and shit bc the emissions stuff looks like ass..
--
98 formula m6
99 firebird 3.8 auto (wifemobile)
89 formula 305tbi m5 PARTING OUT

Posted By: 428bird On: 11-03-2005 @ 15:48:47     Reply | Top | Edit
You might be able to pass emissions with a well tuned non-emmisions engine if you get a new catalytic converter. A new converter really will cut down on the emmisions. This is provided that they do not require a visual engine inspection on your car.

Posted By: 1980azbird On: 11-03-2005 @ 15:56:04     Reply | Top | Edit
Yes...they have a list of what is supposed to be on the car and if not...you are sunk..

Thanks for all the replies from everyone.

Brian

Posted By: OneOwner On: 11-04-2005 @ 17:08:56     Reply | Top | Edit
I've got the 6x-4 heads (professionally worked) that'll fit a 350, etc. very nicely for sale if you're still interested in doing the swap.
--
"You should always do sober what you said you would do drunk. That will teach you to keep your mouth shut." -- Ernest Hemingway

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