Bang for the Buck Purchase

Old June 7th, 2018, 11:30 AM
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Bang for the Buck Purchase

I have been looking around for a BBO for my 1971 Cutlass. I have found these two engines for sale locally.

One is a 425 that has been rebuilt. The seller is very descriptive of what he has done and seems to know his stuff.
https://www.ksl.com/classifieds/listing/52056953

The other is a 455 that came out of a boat. The guy builds boat motors professionally, and in theory, should know a 455 pretty well and know how to get power out of it.
https://www.ksl.com/classifieds/listing/51014224

For a daily driver that wants to be fun (without spending a ton of money) which would you choose? Thanks for the help!
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Old June 7th, 2018, 11:38 AM
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Unless you can get more detail on the boat motor, I'd go with the 425. Boat camshafts are probably not what you want to run on the street. Of course, the 425 only says "stock camshaft" - which one? There were several. I'd also plan on replacing that goofy Offy intake. You'll be a lot happier with a dual plane.
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Old June 7th, 2018, 11:40 AM
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Do you have a recommendation for a change of intakes? I also have a quadrajet carb that I just rebuilt, would that be a good match?
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Old June 7th, 2018, 11:47 AM
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Originally Posted by Wyocutlass71 View Post
Do you have a recommendation for a change of intakes? I also have a quadrajet carb that I just rebuilt, would that be a good match?

Unless you plan to run an O.A.I. hood, I'd use a Performer. I'm a big Qjet fan.
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Old June 7th, 2018, 11:52 AM
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Originally Posted by joe_padavano View Post
Unless you plan to run an O.A.I. hood, I'd use a Performer. I'm a big Qjet fan.
Thanks for the help! I am pretty new to this, and I want to stay with Olds as much as possible.
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Old June 7th, 2018, 12:43 PM
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I'd stay away from the boat engine, they are easily over rev'd which could lead to bearing failure.
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Old June 7th, 2018, 12:46 PM
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Originally Posted by oldcutlass View Post
I'd stay away from the boat engine, they are easily over rev'd which could lead to bearing failure.
Does that come from the boat cam?
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Old June 7th, 2018, 01:21 PM
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No, it comes from a loose nut behind the throttle and possibly influenced by alcohol.
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Old June 7th, 2018, 01:39 PM
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Thanks oldcutlass! Like I said before, I am still really new. I am wanting to learn as much as possible and I hope I don't come across... well dumb haha.
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Old June 7th, 2018, 01:55 PM
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Nope, your doing great my friend.
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Old June 7th, 2018, 03:26 PM
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Years ago I had a QuadraJet that was a boat application. The metering rods were very unusual, with no taper. I figured this was due to jet boats essentially having two operational modes: idle and WOT.
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