1984 z28 305HO to 350 HO swap question. - Team Camaro Tech
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post #1 of 4 (permalink) Old Oct 14th, 05, 11:21 AM Thread Starter
 
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1984 z28 305HO to 350 HO swap question.

I am beginng a project in which I plan to swap the 305 HO in my old 1984 Z28 with a new 350HO. The 350 that I bought can be seen here : http://www.crateenginedepot.com/stor...29-P824C0.aspx.

I plan on purchasing a new intake manifold ( vacuum leak) and possibly a carb if needed.

The car will be used on the street and must pass massachusetts emissions. Due to a low budget I would like to reuse what I can from the old 305.

Does anyone have tips or advice for this project?

Thanks,
Fred
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post #2 of 4 (permalink) Old Oct 14th, 05, 05:53 PM
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Vince
 
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Re: 1984 z28 305HO to 350 HO swap question.

Sorry for the long post, but this car touched my heart....

I had a 85 T/A carb'd 305 and 700r4 with some stall. Put a 350 w/9:6:1 hypers, stock heads, ran a Comp Computer cam (dont know why, seemed like a good idea at the time), RPM, and stock Q-Jet. I used Edelbrock headers for a 5.7 Iroc (bigger). All emission stuff hooked back up, carb was computer controlled. Car ran best 14.0, spinning the one-legger 1st through 2nd till it hooked. Dont know what the rear was, probably 3.08's. Computer was fine - no check engine light, and a good idle. COuld of used more cam. I'm confident that if I sent the carb in for rework, got posi and some stickes, that car would of ran 12's easy. BTW, I ran 87 octane cause I was poor at the time. Engine was 900 rebuilt, 140 intake, 330 headers. Nice kick-*** package

Only problem was that the car killed transmissions. Killed 2 700's, and the 3rd trans died on the kid that bought it from me. I suspect that the 700r4's dont like being shifted at 6500+ rpms.

VINCE
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post #3 of 4 (permalink) Old Oct 14th, 05, 05:57 PM
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Vince
 
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Re: 1984 z28 305HO to 350 HO swap question.

BTW, everything was COMPLETE bolt in. The Eddy headers though b/c they were designed for 5.7 Iroc, the divirter valve on the exhaust didnt fit right. Those stock GM F-body exhausts need to come off!!!

VINCE
69 CHEVELLE SS
502 EFI/[224/228 HR]/T56/3.90
*1.8/11.59/124.34*
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post #4 of 4 (permalink) Old Oct 14th, 05, 07:10 PM
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Scott
 
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Re: 1984 z28 305HO to 350 HO swap question.

Quote:
Originally Posted by Ffrizzell
I am beginng a project in which I plan to swap the 305 HO in my old 1984 Z28 with a new 350HO. The 350 that I bought can be seen here : http://www.crateenginedepot.com/stor...29-P824C0.aspx.

I plan on purchasing a new intake manifold ( vacuum leak) and possibly a carb if needed.

The car will be used on the street and must pass massachusetts emissions. Due to a low budget I would like to reuse what I can from the old 305.

Does anyone have tips or advice for this project?

Thanks,
Fred
Try here --> http://thirdgen.org/techbb2/

Watch the manifold choice...many do not have EGR provisions. You need that for emissions.

Does this disclaimer "should be used in 1979 and earlier pre-emissions street vehicles or any off road usage" bother you at all? It sounds pretty mild, so it wouldn't bother me too much, just asking.

Scott from NJ. Stay thirsty, my friends


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Feather-light suspension, Konis just couldn't hold
I'm so glad I took a look inside your showroom doors


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