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Old 04-09-2008, 06:57 PM
55 Poncho's Avatar
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Vortec swap?

I have a 55 Pontiac Chieftan that is my daily driver. It currently has a 2 barrel 287 with 3 on the tree. Every morning I have pour gas down the carb and beg it to start. I have a smashed up 97 tahoe with a vortec motor. I guess i would like to know if it is possible to put the vortec in without ruining this classic.

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Old 04-09-2008, 08:21 PM
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Sounds like your carburetor needs a cleaning and rebuild... a lot easier than an engine swap.
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Old 10-11-2010, 10:03 AM
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That swap isnt all that hard. But will take away from "classic"

Im a bit of a pontiac purist. If I were gonna swap in something put a good ol poncho v-8. 326-455 in it. Its very similar in dimension to your 287 but with a much better availabily for parts.

I must agree with the last post. A carb rebuild is much easier than a engine swap and will solve your starting woes
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Old 10-11-2010, 10:31 AM
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Quote:
Originally Posted by 55 Poncho
I have a 55 Pontiac Chieftan that is my daily driver. It currently has a 2 barrel 287 with 3 on the tree. Every morning I have pour gas down the carb and beg it to start. I have a smashed up 97 tahoe with a vortec motor. I guess i would like to know if it is possible to put the vortec in without ruining this classic.
Unless your 287 is clapped out, I would be rebuilding the carb, for sure!

If you still want to swap, a few things to consider (and by no means is this a complete list of all that's going to be needed):

The engine will need a carb and intake along w/a distributor unless you planned on swapping in the EFI, harness and ECM, etc. into the Pontiac. You will also need a trans to go behind the SBC engine- the Pontiac stick trans and bellhouse won't fit and the Tahoe's 4L60E needs the "E" (supplied by the ECM).

The drive shaft will need to be made, the trans tunnel will need a hole in it for a shifter or an original automatic trans column used or a custom shifter made for the stick steering column, or an aftermarket column like one from Flaming River or ididit.

Might be a good time to upgrade the cooling system while you're at it. Plumbing the P/S will be needed (if applicable), wiring in the alternator in place of the generator and regulator isn't hard, nor is the opposite side starter wiring- just something else to deal with.
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Old 10-11-2010, 11:15 AM
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I'm sorry to be brutally frank here, but if you can't fix a simple 2bbl GM carb, swapping a late model EFI motor is probably a little out of your skill set.

The most expensive solution possible for your carb problem is to simply have your old one properly rebuilt for about $300 or so. You'll spend almost ten times that to swap the Vortec motor by the time you sort out transmission, carb, distributor, accessory brackets, linkages, motor mounts, trans mount, driveshaft, exhaust, etc, etc. If you don't have fabrication skills or capability, expect to pay even more to have someone do it. Since this is a daily driver, you'll also need alternate transportation for the weeks or months that it will take to finish this swap. On the other hand, it's very possible that the problem is really just a choke adjustment or similar low- or no-cost fix.
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Old 10-11-2010, 03:41 PM
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I'd try National, every Carb they've remanned for me looked & worked better than new.
Here's a link to their Antique Carb site>> http://www.antiquecarburetors.com/
http://www.nationalcarburetors.com/
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Old 10-11-2010, 06:35 PM
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Originally Posted by SSedan64
I'd try National, every Carb they've remanned for me looked & worked better than new.
Here's a link to their Antique Carb site>> http://www.antiquecarburetors.com/
http://www.nationalcarburetors.com/
National Carb does great work,Q-jet on my 406 works great out of the box.I gave them the specs on my engine and they built the carb to match.
Shane
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