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Old 09-08-2015, 08:36 PM   #1  
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getting started

Hey guys, I just recently purchased a 79 z28, with 62k miles. It is bone stock but looks great inside and out. I am completely undecided what to do about the motor and tranny though. It runs and drives great, but as you guys already know it really lacks in the power dept. I don't know where to start. Should I keep it stock but put heads and cam in it for more power or pull the original motor and tranny and opt for a new power plant and drive gear. I want to maintain the driveability as a weekend cruiser but I also want to lay a few black marks on the pavement and blow away a few of those noisy *** Honda's and maybe a mustang or two lol. Any help would be appreciated. Also what is the best way to get an overdrive ready that matches my car? I plan on doing most of the work myself, I am very mechanically inclined but this is my first muscle car. Thanks

Last edited by z28newbie; 09-09-2015 at 09:23 AM.
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Old 09-09-2015, 10:26 AM   #2  
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Re: getting started

Welcome to!!

Sounds like you are going to have some fun with the 79 Z28. I will advise that we are sort of limited on 1st and 2nd Gen members, so replies may take a while.

The "Site Help & Suggestions" forum is not the best place for a tech question. I'll copy this to the "General 67-02 F-Body Tech" forum, and close this one. See the link below to track down your thread.

As far as your question about the engine and trans, what trans does your 79 have now? As I recall, the 5.7L/4 bbl Qjet 175HP engine was standard with the Z28, and it was available with the standard 4-speed manual, or the optional TH350 automatic.

With regard to the O/D, you would have to upgrade to a more recent trans like the 700R4 to replace an automatic, or a T-5 (5-speed) or T56 (6-speed) to replace the 4-speed manual. Another option is a Gear Vendors 0.78:1 O/D unit that attaches to the back end of whatever trans you have. I’m using one with a TH400, and it makes the RPM much more bearable on the street, particularly with 4.11 gears.

Last edited by Injuneer; 09-09-2015 at 10:29 AM.
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