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Old 06-16-2010, 05:49 AM
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Olds Pontiac Engine Swap

I have a 69 Pontiac Tempest project car with no engine or transmission (or most anything else under the door). Iíve run across an Olds 350 and transmission out of a 73 Delta 88. How close to a bolt in matchup is this? Iíve heard that this may be an easier swap than using a Chevy 350.

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Old 06-16-2010, 07:38 AM
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With the right A-body mounts, either will go in place. Both the Olds 350 and the SBC have the starters on the same side, but both are opposite of the Pontiac, so either engine will be close to the same amount of work.

That said, the swap to any GM V8 engine w/the exception of a Cad will be a mostly straight forward swap. There will be holes in the front crossmember to accommodate a different engine, be it Buick, Chev, Olds or Pontiac.

The tranny from the Olds 88 will be a long tailshaft, so if you plan on using it you'll probably need a different d-shaft or yours shortened if the Tempest had a short shaft tranny in it. If it was a TH400, the yoke will also need changed.

Hopefully the tranny x-member will still be w/the Tempest, and the Tempest hopefully was equipped w/the TH350 tranny. Otherwise, you'll want to get the x-member when you get the mounts, etc.

IIRC, the Olds 88 d-shaft will have a constant velocity rear U-joint, but you might want to grab it anyway if it's available free- the front yoke will be usable if you don't have a d-shaft w/the Tempest. Otherwise, plan on grabbing a d-shaft along w/the tranny crossmember from the donor car that you get the motor mount set-up from, for whatever engine you end up using.
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Old 06-17-2010, 08:31 PM
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Olds and Pontiac motors use completely different frame and motor mounts. The only direct bolt-in aspect is that the BOP bellhousing bolt pattern is the same. Everything else is different (well, the starter is interchangeable). The Delta frame mounts won't work in an A-body. You need the correct 64-72 Cutlass frame mounts and Anchor #2261 rubber motor mounts.
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Old 06-18-2010, 06:31 AM
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To be honest with you, there is really nothing in the Tempest to bolt to. No frame mounts, no exhaust, no brackets for anything, no drive shaft.
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Old 06-18-2010, 06:40 AM
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Quote:
Originally Posted by jdbarlow
To be honest with you, there is really nothing in the Tempest to bolt to. No frame mounts, no exhaust, no brackets for anything, no drive shaft.
All the parts you will need are available, either through eBay, craigs, aftermarket, local junk yard, online junkyard, etc.

Decide what engine you want to use. Then source the parts for that year/model of GM A-body. A swap doesn't get much easier than this.
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