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Roger 911 Roger 911 is offline
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Join Date: Dec 2002
Location: Chicago
Posts: 862
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Originally Posted by Dodge Man View Post
IMHO Keep your 72 numbers parts to preserve the value of the vehicle. Get the matching EFI brain & EFI wiring to the brain from the donor car. EFI tends to be a little be happier with the matching brain. I went with 3.0 CIS (carbs work well too) in my 73 because it was the least amount of changes. The 3.2 will bolt up but the trans/ring & pinion will be a concern if you like to hot rod the car. Some people have not had issues but others have sheared 7:31 gear teeth because of the increased torque (not peak HP). A 8:31 915 will handle the torque but will probably require a speedo change. The suspension & tire size will also need to be considered if you want to hot rod around. Is it is a matching numbers car? Is it just better to get a later model Carrera for the 3.2 power? Not passing judgment, just saying. Make yourself happy.
All the original stuff is long gone (not a concern for me). I do have the matching DME, harness, and everything else from the donor car, including the 8:31 915 w/LSD. Yes, I changed the speedo to an electric as well. Suspension is good at 21/27 torsions, 19/19 sways, tires are 205/55 and 225/50 on 16" Boxster rims, bunch of other usual suspension mods for DE, bigger brakes, etc. I should be fine in this respect. I just wanted more power with better everyday drive-ability, without draining my kid's college fund!

Roger
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'72 911 3.2
'18 Mustang Eco PP
'17 Mustang GT Conv
Old 03-17-2013, 03:59 PM
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