Mayt13

Hi guys,

I have an old scratched up Z28 that runs pretty good TPI 305 W/ the five speed and T-tops. Here's the thing, the previous owner beat her up pretty bad. In fact the only thing he did right was the paint job (a nice metal flake grey), but He tried to install headers and custom exhaust, but left the cats off, ran it too low and bent the headers a little to get them to fit. He also put the 5 speed in and did a really crap job making the cut in the unibody (large and jagged). I fixed all the BS he did to the engine itself, so that's ok. Also apparently he crashed it at some point because the right A arm looks like it was broken and repaired, but the car tracks straight. Finally, maybe my springs were just old, but it kept bottoming out so I used some spring spacers to lift it up a little. Oh and the engine cross member and exhaust (still useable) are dented to crap.

However, I love this car. I've fixed so much on it and it seems like a shame to let it go. It still handles great, so I think the unibody's ok.

I currently ride a motorcycle everywhere I go and my parents are freaking out. They think I'm going to die (Las Vegas is not a good place to ride a motorcycle). They are willing to give me some cash to fix it up, and I need some advice.

What I want to put in this car:
TPI 383 stoker (I love TPI, I know it inside out and backwards)
Roll cage and race seats (5 point harnesses)
Aftermarket rims that will run 245 up front and 295-315 s in back

Other things I might want to do:
New Transmission (or rebuild old one) ?
New Exhaust (true dual like I have)/ or just new headers?
New Rear End (I had drum breaks in back)?
New Springs? shocks or other suspension components?

I can do all the work myself, but my budget is not all that high. like 3000-6000

What parts would you guys recommend? Crate motor? Suspension kits?
350->383 conversion kits? Things to look for when having a roll cage made? Rims that have worked for people in the past? good race seats?

Also will 305 heads work on a 350/383 and simply raise compression? Can I have them made to work at a machine shop? Will my 305 intake bolt up to a 350/383? It should right? There is no difference in the actual block, only the bore.

Thanks!

Brando5641

iTrader: (-1)

Hell if you got 6k to drop i would just sell it and get another one. 6k for a 3rd gen will get you a nice one.

Ozz1967

iTrader: (4)

I would start by replacing the springs with Eibach or Hotchkiss lowering springs, Koni shocks/struts, and adding subframe conectors, also frmo Spohn. (SFC's especially since it was cut for the manual tranny swap)

Leave the rear-end for now, but you can replace it with a later 89ish rear axle to get your disk brakes, but that's not a priority with everything you've just said it needs, so I'd leave it right now.

With the manual transmission (Does it work properly?), you can run a true dual exhaust pretty easy. If not, get a set of Hooker 2055 or Dyno Don shortie headers w/y-pipe, and run a 3" exhaust with highflow cat.

After this, you're getting into more engine work and I don't know if that's what you want to do.

305 heads will work, with some work, but your'e compression will be sky-high, so I wouldn't recommend it.

Here is a link to popular hotrodding's 300hp 305 motor.

http://www.popularhotrodding.com/eng...s/viewall.html

Mayt13

Yeah, building and engine is no prob. I'm self taught and I've changed pretty much everything on this old 305 (165,000 miles never been rebuilt) short of piston rings.

Btw I want a FULL roll cage + race seats + race hannesses. Not just subframe connectors. Is there like a roll cage schematic I can buy or somthing? + Advice on Race seats that work for third gens?

On the springs Im not sure if I want it any lower. My true dual runs so low already and I dont want it to bottom out.

Transmission works fine but the gear synchros are a little worn. I have to go into fith before reverse.

ok so my heads will work? Do I need to have the valve seats re-done for performace High flow? since Im going to a bigger displacement?

Will a 305 intake work? Isn't the EGR different? I think it will bolt up. PS I have a set of high performace venom injectors that spray like double the gass of the 305 injectors. since im going from 5.0-6.2 I think it makes sense to use them right?

And Advice on Crate motors?

Ozz1967

iTrader: (4)

are you planning on racing the car in autocross? Getting in and out of a car with a roll cage is a complete pain.

Your 305 intake will bolt on to a 350 block just fine.

You say you're going to a 6.2 litre, is that certain or are you going ot build the 305?

Do not use 305 heads on a 350, they won't work "well" at all, but yes, they can be made to work. Howeve,r with the cost of that, you might as well pick up a set of World or AFR heads which will work/flow much, much better.

What is your "goal" with the car?

Mayt13

Ok here's what I was thinking of doing to the enigne:
82-92 350 block bored .030 over
Eagle 383 rotating assmebly w/ flat top -14cc pistions
My 305 heads Ported from 190CFM to 200-230CMF
w/1.88-1.94 valves
305 intake, 305 injectors (although I have a set of venom injectors)
Crane Cam
#104124
214/220
.452/.456
112

Goals With Regards to the Engine:
Relyablity
400HP
When driving agressivly Shifts around 5700-6000 no more
Torque! Lots of Torque. Like 500-600 ft/lbs
Gas miliage

Car will be a daily driver. So I need this build to last. Also, gass mileage is fairly important so if we can keep this thing in double digits I'd be pretty happy.

ChrisC

Your 305 heads are going to raise the compression way too much for your plan. If you want to daily driver it, you are going to be happier going with a different set of heads like Ozz mentioned and keeping your CR more tame.

Mayt13

I dont know... I really cant afford a thousand doallar set of heads. Anyway I want to use a TPI intake manifiold and that only works with TPI heads. I was considering have the shop increase the size of the compression chambers.

Ozz1967

iTrader: (4)

Take a look at these. They are what I have on my 350.

http://www.summitracing.com/parts/wr...50-2/overview/

Also, quick ebay look found these. Aluminum L98 heads, same as came on the 350's in the Camaro's and Firebirds. Except aluminum because they're from a corvette.
http://www.ebay.com/itm/1988-1991-C4...3980a0&vxp=mtr