'64 tempest i6 to v8 conversion questions - Pontiac GTO Forum
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post #1 of 17 (permalink) Old 08-14-2013, 12:10 AM Thread Starter
 
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'64 tempest i6 to v8 conversion questions

I just acquired a 1964 tempest sedan and it is in pretty good shape. I want to put a fuel injected late 80s early 90s camaro 350 in it but I don't know if it will bolt to my factory 2 speed powerglide transmission. Anyone know what will be the easiest and cheapest swap? Maybe I should stick to a carbureted engine? Also other things I may run into during the swap, need advice!
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post #2 of 17 (permalink) Old 08-14-2013, 07:49 AM
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Chevy engine is going to use a different trans bolt pattern. You can do fuel injection but it will require all those components to make it work.
Why not just do a Pontiac v-8??
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post #3 of 17 (permalink) Old 08-14-2013, 10:37 AM
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The '64 Tempest does not have a Powerglide. No pontiac does. It has a Superturbine 300 2 speed, and it's different. The GTO ST300 has more clutch packs and is stronger. Not sure if the l-6 and 326 v8 trannies are the same. The cheapest swap would be to put a Pontiac 326 engine in it. I've seen maybe 6 running 326's given away for free in the past year or two, as nobody wants them. They are an excellent engine. Good power, mega-torque, and decent mileage. You'd be surprised. Try the performanceyears forums and post an engine wanted thread....you migh just get lucky. If you want to put a SBC in it, change out the engine mounts, trans, and driveshaft, and you'll be all set. A LOT more $$$$, though. And little if any performance advantage over a nice 326.
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post #4 of 17 (permalink) Old 08-14-2013, 02:12 PM Thread Starter
 
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Ok thanks for the advice, also if I want to use a 4 speed auto or preferably a manual transmission which trans would I want to source?
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post #5 of 17 (permalink) Old 08-14-2013, 02:55 PM
 
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Any TH350 or 400 as long as its the BOP (Buick, Olds, Pontiac) bolt pattern.

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post #6 of 17 (permalink) Old 08-14-2013, 04:21 PM Thread Starter
 
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Ok, so if I go with a 326 ci engine and a thm350 will the trans hook right to the factory driveshaft so I can use the stock rear end for the time being?
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post #7 of 17 (permalink) Old 08-14-2013, 04:48 PM
 
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yep i am running a TH 350 to a 473 with the 326 driveshaft.

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post #8 of 17 (permalink) Old 08-14-2013, 04:58 PM
 
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if you want a OD trans you'll have to do a little work, not up on the details but plenty have done it. Your car probably has a tall rear gear 2:56 - 2.92 which will let you drive it on the highway no problems up to 120. I was kicking around re-building my 326 just for sh*#s and giggles, Pontiac 350's are next to nothing too and all the go fast stuff for the 400+ motors will bolt right up. ALL pontiac blocks from 326-455 are the same physical dimensions, so all ancillary parts will fit in most cases.

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post #9 of 17 (permalink) Old 08-14-2013, 05:16 PM Thread Starter
 
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http://phoenix.craigslist.org/nph/pts/4000634653.html

Could someone check this out for me? It's a 72 Buick skylark 350 and transmission for 450 bucks
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post #10 of 17 (permalink) Old 08-14-2013, 05:18 PM
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For a 4 speed manual, you want an M-20 Muncie. But be prepared to pay big bucks for the pedals, linkage, shifter, and trans. You can do a bolt in TH350 automatic and get the same performance of the stick for about 1/4 the cost. A nice 326 with a TH350 would be a respectable performer and fun to drive. Won't kill you on gas, either.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

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