Cutting of Heater Box For DSD Carbs in GT?

[tevo]

Does anyone have pics, or can tell me where to cut on the heater box for twins 40 for my 73 GT? I am trying to have the car done by the the 16th for the Tacoma show.
Thank you

[P.J. Romano]

I assume that you want to keep heating function. I also assume that you are using short intakes.
In that case, the back carburetor will likely be too close to the heater box (see attached pic). The picture shows extreme case, there is usually about 1-1.5 inch space between heater box and the last carburetor. What you want to cut is the section that is covering heater tubes and protruding in the engine bay approx 2 inches (see pic 2).
You should than shorten the tubes (pic 3) and replace them with rubber hoses. Hoses can be tucked deeper inside which will give you approx. 1 inch extra space. Not much but enough for slim filter or very short air horns. Do not forget to enclose the opening with steel or aluminum sheet (use paper to figure out exact shape). The cover can be attached with pop rivets or small screws.

[tevo]

thanks for the pics PT romana thats going to help me thanks

[P.J. Romano]

Just finished installation of DSD Webers 40 DCOE and Sprint exhaust manifold. Even after the heater box "surgery", space for the last barrel is very limited. I must now manufacture some kind of air box which will be challenging.
Huge improvement in a car performance though! Some hesitation at low RPM, probably due to 34 mm chokes, I will try 32 or 30 mm.

[opelgtmaster3]

where did you get your carbs? and where did you get the intake manifolds?
if you dont mind me asking.

[P.J. Romano]

where did you get your carbs? and where did you get the intake manifolds?
if you dont mind me asking.

I don't mind. It took me about two years to collect everything. It was not necessarily unavailability of parts, rather the availability of funds.

So, here we go:

Carburetors: Shop eBay Canada Store - ALFA1750'S CARBURETORS PARTS STORE:: WEBER CARBURETORS, SOLEX CARBURETORS

Short intake and modified thermostat housing: John Palmos, Greece [motorman253@yahoo.com]

Throttle linkage: Eurocarb Ltd. (sales@dellorto.co.uk)

Air filter (not installed yet): MISAB Sweden MISAB BILRESERVDELAR, MISOIL Motorolja, MISAB Batterier, Frgasare, Trimningssatser

Various sizes of chokes and jets: Carbparts Direct eBay Store - carb parts direct: Rebuild kits, Carb parts, Conversion kits