the 350 and 455 are perfect swaps. i am nearly sure the 307 uses the same side
mounting. so a 350 and a 455 will bolt right in. the chev will bolt up but you
will loose 2 bottom bolts. there is an adapter that does this nicely.
Ron Ramirez wrote:
> O.K., guys and gals, I apologise up front for this off-topic question but as
> we have been having discussions on changing from small block to big block,
> Cadillac flower cars, etc., maybe some of you can give me some advice.
>
> My car, a 1989 Cadillac Brougham, has nearly 220,000 miles. If I were to
> give it a name, it would be "Ol' Reliable." It is in great shape overall and
> it is a keeper.
>
> The problem: It is really starting to show its age, power-wise (or the lack
> thereof). It has its original 5.0 litre (307 CI) Oldsmobile V8 that has
> never been rebuilt; the worst thing that has been done to it is to have its
> intake manifold gasket replaced at 150K and its on-board computer at 180K.
> It uses no oil, doesn't knock, runs smoothly. BTW, all those miles are from
> lots of highway driving.
>
> On a drive Saturday between Evansville, IN and Louisville, KY on I-64, the
> road was all uphill and downhill, repeatedly. On the uphill grades my speed
> dropped to 60 and sometimes 55 and the car would not go any faster until I
> got over the top and started downhill again.
>
> I am wondering if I should begin thinking about an engine
> rebuild/replacement. I want more power out of this thing. Any suggestions?
> (Yes, it has been tuned up recently.)
>
> BTW, Jim, the thought of a bigger block did cross my mind - but not a 454,
> more like a 472 or 500...8^)
>
> Here is a good reason to avoid those 305/307 motors in your truck rodding
> projects. I have a relative with an '86 Caprice, it has the ubiquitous Chevy
> 350 that will run circles around my Caddy.
>
> So...my questions are: If I switch to a 350, is it possible to modify/do
> away with the on-board computer? Will a Chevy 350 mate up to the 200-4R
> tranny in the car (I suspect not, the original motor is an Olds)? Can I drop
> in an Olds 350 to get the tranny to mate, but then what about the computer
> system? Can the 200-4R handle the extra HP/torque of the Olds 350?
>
> Since this is off-topic, please e-mail me direct with your
> thoughts/suggestions at
>
> ron@philcoradio.com
>
> and NOT to the list.
>
> I apologise again for going off-topic, and for all the rambling. But I
> respect the opinions of you folks. Thanks in advance.
> --
> Ron Ramirez - ron@philcoradio.com - Providence, KY
> http://www.philcoradio.com (New site coming soon!)
> http://www.chevytrucks.org/ (Webmeister of this site)
> http://members.xoom.com/mrphilco/ (Route 66)
> http://www.geocities.com/mrphilco/ (Zena Dare, early actress)
>
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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