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Grog's Pontiac Powered V-8 Z On-Line


Grog

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hey mr. grog, i have M21s and t10s that were spares from my last z car, me being me, my trans of choice is a M21, it would be a M22, but man they go for bucks, if i ever do a v8 any car again, im getting me a four speed, and i put that on the dog. nice car.

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Guest 400 ci 280z

thanks! also i went to autozone and they had rubber motor mounts for $15 each. the guy here said there should not be any difference in the size between solid and rubber. just thought i would pass on the info that i found.

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Guest 400 ci 280z

i just went in and said that i had a 69 pontiac engine and just picked a model. i have not bought the mounts yet but i will pick one up in the next couple of days and see how it fits. i do not know if there is a differance in the mounts from a gto or another model but i will find out. also what model did you get your solid mounts for? i hope this helps.

 

chris

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  • 2 weeks later...

It is an interesting, albeit, unusual swap. I think one thing I will change later is the configuration of the motor mounts when I decide to swap in a Mustang P/S unit. For now, its functional.

 

I must apologize for the laps in replies to everyone who has sent me a message regarding the swap. Lately, between work/family, it has been difficult to stay on top of my messages. I have a self-imposed deadline to get the car in primer befor next Monday, and so far I have all of the body parts that can be removed in primer. Now it is just the shell and I have been dedicating alot of free time getting the final bodywork touches just right. I will post pics on the website when it is done.

 

Grog

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hmmm.. I like it Grog...

 

I am more confused than ever about what engine to swap in :D

 

We used to have a '65 GTO about 10 years or so ago.... This post has got me pondering putting a 389 in a Z...

 

But....tranny wise... can you get a 5 speed to work with it??...or that will handle the torque?

 

Always loved 389's...like to see one sticking in my Z :D

 

Along with the small scoop on the hood of the Goat 2thumbs.gif

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Cruez,

 

The best Pontiac engine to use is the 77-78 400's. The blocks from those specific years were cast with more meat between the cylinder walls and (I think) a higher nickel content. Probably the strongest of all the factory Pontiac blocks. Salvage yards are littered with them and you can pick one up for a song. Plus, it is not unusual to build one with the capability of turning out 450+ HP and run it on 92 octane. The 428's are rare, and the 455's are more expensive and were cast with weaker crankshafts. The 350 is a great motor as well, but for the money and benefits realized, the 400 is the way to go.

 

I am sure a World class T-5 out of a 93+ Camaro/Firebird will work with the right bellhousing. Lakewood should have one that will match. A T-56 will bolt up with the right parts. As with any engine/tranny combo, durability is a function of horsepower and driving habits. If you plan on standing on a Pontiac powered Z excessively, things will start to break. Prudence and your pocketbook should dictate what repairs you can regularly afford. With that in mind, you should be able to estimate how many Mustangs/Camaros/Firebirds your wallet will allow you to bury at the drag strip.

 

Happy hunting.

 

Grog

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A Poncho powered Z is a unique item. A 400cid can produce around 450 pounds of torque with cast iron heads/intake & stock crank revved under 5600 rpms. In a Z you don't need all those money eating goodies.

 

Love those Pontiacs. I just got a 68 convert GTO, a 68 convert Lemans as a donor for the GTO, a 69 hardtop GTO, all to go with my longtime 69 convert Lemans. Doug.

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Guest 400 ci 280z

grog,

 

have you had time to add any new stuff on your site? i know you you dont have that much time to do anything with it im sure. i only have 2 day a week i can work on my car and that is mon. and fri. after school which sucks so i am going to maybe find a different job but never mind i am just rambling on.

 

chris

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I haven't added any any new items to the website since the end of July. I had a self-imposed deadline to get the car in primer and a few other goodies in order before the end of August. I met my goals, so now I have time to throttle back (pardon the pun) and dedicate some time to the site. I will post some pics of the car in primer with a few details. Additionally, I am working on a build sheet on how to swap in the electric window motors out of an 85 Nissan Stanza into early model Z's with minimal effort. Essentially, it is practically bolt in modification and someone could do it in half a day with the doors removed. I should have this done within a week or so.

 

Grog rockon.gif

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Guest 400 ci 280z

great job with primering your car. i wish i had time to do any thing on the car but i have not been able to :mad: . i want to make a small welding table and fab up some mounts in the next two weeks then start saving for the engine build. i am hopefully going to get sundays off so i can actually work on it for more than a few hours. anyway great jop on the progress and good luck with the window motors.

 

chris

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