buick 300 engine convert 2 barrel to 4 barrel

bigwilly

Active Member
I have a 65' lark with the 300/310 wildcat and the factory 2 bbl rochester carb....it does have the super turbine 300 switch pitch trans.....looking to add a little more power...thought I could find a 4 bbl intake and carb setup from another 300 engine and just plug and play thing ??? or more involved than that ??? if anyone has any other ideas about it please chime in...

....not after a rebuild...300 runs good...just wanting to make it growl just a little more ....I have already converted to HEI....and electric fan and aluminum radiator(runs really cool)...so I was just leaning to put a 4bbl carb on it and dual exhaust to let some more air/fuel in.....
 
The 300 4 bbl. intake is a one year (1965) ONLY part. Just about ANY 4 bbl. can be used with an adapter plate. Then all you need to do is figure out the linkage, easy, & how to hook up the down shift/switch pitch linkage, more difficult.
 
Tom is mostly right.

there's an OEM 4v alum intake from 1964 ... but it is designed to be used with the aluminum 1964 heads.

your heads are cast iron.

the problem with alum Buick intake on the cast iron heads is that the 1964 design has narrower cross section runners. this is not nearly so bad as the cast iron 4v intake ( wide runner ) on top of the alum heads ( reversion step at intake / head ), but it's not the greatest. the 64 runners are restrictive enough that many people prefer the cast iron intake+heads for making 300 power, in spite of the weight penalty.

another alternative is a 4v setup from the Buick 215ci ( 1961-63 ) or the Land Rover v8 ( 3.5L to 4.6L, 1966 to 2004 ). however, the original Buick small block, the 215, has a shorter deck than the 300. therefore, any intake for one of these engines would require you to fab up spacer plates to fit between the head and intake.
 
I had the 64 aluminum 4bbl intake on my 67 300 in HS. It was all I could find at the local junk yard and it was better then the 2bbl. The 65 4bbl would have been ideal, but, even in the late 70s, they were hard to find. The internet makes the search easier, but more expensive now.
 

bygblok

New Member
I have an original 300 4bbl intake also and will be at the turkey run. Have offers of $300 on it over on v8 buick. I'll bring it to Daytona for that money if you're interested. I'll get you the casting numbers but it is a correct manifold for a 65 and newer.
 

bigwilly

Active Member
thank you bygblok.....I actually live in St Augustine....Don't happen to have the 4bl carb that was on it do ya ?? for a package deal ....thanks
 

bygblok

New Member
I sure don't have the carb. Wish I did because they're even harder to find than the intake from what I gather. The intake was in the car I bought along with another complete 300 AND I've got the 300 that's in the car now that runs perfect along with the trans. I'm going 5.3/4L60 on my 66 so none of the Buick running gear will be staying. Even have a Chevelle 12-bolt going under it as of right now.
 

jayde

New Member
Hi has anyone seen the manifold be for or d? I have looked everywhere for this design

[video]https://youtu.be/Zrjw1L9W73Y[/video]:confused:
 
i think that's a Rover / 215 intake, if you'll notice there's no belly pan.

definitely not for a Bu 350 or BBB, the center intake runners are siamesed. on the 350 and BBB, it's the center exhaust runners that are siamesed.

it looks somewhat like the Edelbrock performer on pg 41 of the current TAPerformance catalog, but the performer is a dual plane.
 

jayde

New Member
Hi there .I just can't find this design I do have other Inlet manifold I have the Edelbrock intake and a harcourt single plane but they don't look anything really like the one I've got on YouTube it must be a prototype. I send a email to T A performance but they haven't got back to me on the logo.
 

'64 Droptop

New Member
I just sold the iron intake this week. I have an aluminum intake manifold for a '65 that I would sell you for $300 plus shipping which is around $25. I do not know if it will fit a '66. Maybe someone will add to this and let us know.
 
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