1980 Monza Town Coupe

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1980 Monza Town Coupe

Postby Diesel Dan » Fri Jan 16, 2015 2:51 pm

Started working on my 1980 Monza T/C, slowly....

Engine/trans is out.
Have a donor car for a powertrain but that doesn't mean I'm gonna use it, plans always change.

Told the wife someday I'd like to do a rotisserie build but for now I'll just clean things as I go and hopefully drive it this summer.
m1.jpg
Engine compartment overview
m1.jpg (209.9 KiB) Viewed 1012 times


Removed the battery tray and cleaning up the metal under it while I'm here.
m3.jpg
battery tray
m3.jpg (210.77 KiB) Viewed 1012 times
2000 Chevy Classic crewcab, 6.5TD
1980 Monza Town Coupe, 36K miles
Past rides:
-1980 Monza Spyder 2.5L/4spd
-1976 Monza Town Coupe 4.3L V8/4sp
Diesel Dan
 
Posts: 84
Joined: Tue Aug 19, 2014 11:31 pm
Location: Columbia, TN


Re: 1980 Monza Town Coupe

Postby Diesel Dan » Thu Jan 22, 2015 10:56 am

Engine compartment cleaned and coated with satin black chassis paint.
Image

Working on the underbody right now. So far all the metal is solid and just surface scale. Going to coat with some rust encapsulator paint.

Image
2000 Chevy Classic crewcab, 6.5TD
1980 Monza Town Coupe, 36K miles
Past rides:
-1980 Monza Spyder 2.5L/4spd
-1976 Monza Town Coupe 4.3L V8/4sp
Diesel Dan
 
Posts: 84
Joined: Tue Aug 19, 2014 11:31 pm
Location: Columbia, TN

Re: 1980 Monza Town Coupe

Postby zeke » Thu Jan 22, 2015 2:11 pm

Engine bay looks good Dan. :th:
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1979 Chevrolet Monza 2+2

Re: 1980 Monza Town Coupe

Postby Diesel Dan » Fri Jan 23, 2015 12:00 am

zeke wrote:Engine bay looks good Dan. :th:

Thanks, while not show quality at least it will be presentable now.

Thinking about a plastic battery tray from a newer style car.
Something that bolts into place and can be easily removed for cleaning.
2000 Chevy Classic crewcab, 6.5TD
1980 Monza Town Coupe, 36K miles
Past rides:
-1980 Monza Spyder 2.5L/4spd
-1976 Monza Town Coupe 4.3L V8/4sp
Diesel Dan
 
Posts: 84
Joined: Tue Aug 19, 2014 11:31 pm
Location: Columbia, TN

Re: 1980 Monza Town Coupe

Postby gerbsinmd » Sat Jan 24, 2015 9:52 pm

I have a battery tray from a 2002 GMC pickup that bolt in pretty well.
1997 Blazer - Being driven by my daughter :S
2008 Town & Country - Kid transport
2002 Saturn SL2 Commuter car 36mpg!!!!

1977 Monza Mirage being Restified!!
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Location: Dunkirk, MD

1977 Chevrolet Monza Mirage

Re: 1980 Monza Town Coupe

Postby Diesel Dan » Wed Feb 18, 2015 12:06 am

Project came to some what of a halt.
Ended up selling the donor car, 1998 Camaro with 3800/4L60E.
It was truly rust free and too nice to cut up.

Currently looking at some other "unusual" powertrains.
2000 Chevy Classic crewcab, 6.5TD
1980 Monza Town Coupe, 36K miles
Past rides:
-1980 Monza Spyder 2.5L/4spd
-1976 Monza Town Coupe 4.3L V8/4sp
Diesel Dan
 
Posts: 84
Joined: Tue Aug 19, 2014 11:31 pm
Location: Columbia, TN

Re: 1980 Monza Town Coupe

Postby Diesel Dan » Sat Feb 28, 2015 10:49 pm

Back to working on the car some more.
Sale of the Camaro fell through so dismantling proceeds.
camaro.jpg
camaro.jpg (171.09 KiB) Viewed 788 times
2000 Chevy Classic crewcab, 6.5TD
1980 Monza Town Coupe, 36K miles
Past rides:
-1980 Monza Spyder 2.5L/4spd
-1976 Monza Town Coupe 4.3L V8/4sp
Diesel Dan
 
Posts: 84
Joined: Tue Aug 19, 2014 11:31 pm
Location: Columbia, TN

Re: 1980 Monza Town Coupe

Postby ponchonuty » Tue Mar 03, 2015 12:06 am

Now that's a good use for a Camaro! LOL Looking good!
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Re: 1980 Monza Town Coupe

Postby Diesel Dan » Fri Mar 06, 2015 12:54 pm

Test fitting to see what fits and what hits.
What F-body parts don't fit:
-motor mounts
-exhaust manifolds
-a/c compressor and mounts
0306151140-01.jpg
0306151140-01.jpg (225.05 KiB) Viewed 715 times


Making new motor mounts.
Used some 3/8" CR flat stock for the base and some dorman 722-006 spring shackles for a rubber mount in shear.
0306151140-00.jpg
0306151140-00.jpg (235.26 KiB) Viewed 715 times
2000 Chevy Classic crewcab, 6.5TD
1980 Monza Town Coupe, 36K miles
Past rides:
-1980 Monza Spyder 2.5L/4spd
-1976 Monza Town Coupe 4.3L V8/4sp
Diesel Dan
 
Posts: 84
Joined: Tue Aug 19, 2014 11:31 pm
Location: Columbia, TN

Re: 1980 Monza Town Coupe

Postby vegastre » Sat Mar 07, 2015 6:47 pm

Good Job

It will fit, just takes a whole lot of measuring and a bit of fab work.

Keep us updated =)
Phil Kennedy~
72 Chevrolet Vega GT Hatchback
75 Pontiac Astre SJ Safari Wagon
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Re: 1980 Monza Town Coupe

Postby NixVegaGT » Mon Mar 09, 2015 11:10 am

Holy clean car! Nice find. I like the idea of using that v6. That's a solid choice. Only 392lbs fully dressed, and short in both directions. 205 hp naturally aspirated. Cool.
- Nic '73 Vega GT "DogBoxx" Batwing LS1
http://www.cardomain.com/ride/2357894
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Re: 1980 Monza Town Coupe

Postby Diesel Dan » Thu Mar 12, 2015 11:42 am

Decided to open up the 4L60E and freshen it up since the fluid was burned.
No major failures, couple of mildly dark clutches and probably a smoked T/C.
Going to replace the sun shell while I'm there too.
trans.jpg
trans.jpg (243.29 KiB) Viewed 633 times


Bonus is I will be able to use an empty trans case for mock up which will be much lighter.
Down side is more time.
2000 Chevy Classic crewcab, 6.5TD
1980 Monza Town Coupe, 36K miles
Past rides:
-1980 Monza Spyder 2.5L/4spd
-1976 Monza Town Coupe 4.3L V8/4sp
Diesel Dan
 
Posts: 84
Joined: Tue Aug 19, 2014 11:31 pm
Location: Columbia, TN

Re: 1980 Monza Town Coupe

Postby Diesel Dan » Tue Mar 17, 2015 12:29 pm

transtunnel.jpeg
Transmission need to go about 1" farther towards the passenger side, will have to modify factory mounting location
transtunnel.jpeg (213.71 KiB) Viewed 597 times
Attachments
core support.jpeg
Throttle body is going to be closer than I thought to the radiator, a '99-02 cableless TB would give more clearance.
Orange string is my plumb bob to keep engine centered.
core support.jpeg (105.2 KiB) Viewed 597 times
2000 Chevy Classic crewcab, 6.5TD
1980 Monza Town Coupe, 36K miles
Past rides:
-1980 Monza Spyder 2.5L/4spd
-1976 Monza Town Coupe 4.3L V8/4sp
Diesel Dan
 
Posts: 84
Joined: Tue Aug 19, 2014 11:31 pm
Location: Columbia, TN

Re: 1980 Monza Town Coupe

Postby Diesel Dan » Thu Mar 26, 2015 12:29 pm

Motor mounts are burned into place.
Was able to reuse the factory frame plates so I had to shorten the shackle mounts, rubber bushings pressed in/out very easy.
engine3.jpeg
engine3.jpeg (242.67 KiB) Viewed 547 times


Pic of the RH mount:
rh mount.jpeg
rh mount.jpeg (182.65 KiB) Viewed 547 times


Pic of LH mount:
LH mount.jpeg
LH mount.jpeg (186.86 KiB) Viewed 547 times


Have only 3.5" of clearance to radiator for air inlet to the throttle body.
This is where a '99-02 3800 with drive by wire would give several more inches of clearance.
TB.jpeg
TB.jpeg (217.99 KiB) Viewed 547 times


Still have a little clean up on the welds and brackets before paint.
Next off to the trans mount so the power train can sit on its own while I make some exhaust manifolds.
2000 Chevy Classic crewcab, 6.5TD
1980 Monza Town Coupe, 36K miles
Past rides:
-1980 Monza Spyder 2.5L/4spd
-1976 Monza Town Coupe 4.3L V8/4sp
Diesel Dan
 
Posts: 84
Joined: Tue Aug 19, 2014 11:31 pm
Location: Columbia, TN

Re: 1980 Monza Town Coupe

Postby Diesel Dan » Thu Apr 23, 2015 1:27 pm

Shipment of parts for the exhaust manifolds came in today.
Flanges for 1.5" primaries, 180* tight radius u-bends and 1.5-2.0" reducers. Thanks to west coast Fiero.
headers.jpeg
headers.jpeg (169.15 KiB) Viewed 481 times




Going to (try) and make some "log" style manifolds with a 2.0" main.
Something along the lines of this LH manifold but with a 45* turndown for a crossover.
turbo_3800_left_500.jpg
turbo_3800_left_500.jpg (105.92 KiB) Viewed 481 times


Progress slowing down, everything else getting in the way right now.
2000 Chevy Classic crewcab, 6.5TD
1980 Monza Town Coupe, 36K miles
Past rides:
-1980 Monza Spyder 2.5L/4spd
-1976 Monza Town Coupe 4.3L V8/4sp
Diesel Dan
 
Posts: 84
Joined: Tue Aug 19, 2014 11:31 pm
Location: Columbia, TN

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