[Diy_efi] early Cadillac sensors compatible with GM ECM?

[Chris Carson]

I've got the later aluminum intake from a 78 Seville. The coolant leak
problem is the same for all aluminum intakes on Olds engines when you use a
stock steel valley pan gasket -- I had that problem with my 307.  You can
fix it by going with a pair of composite gaskets.
Only problem I see, that CTS I pulled from the 307 intake will need a
freakin' HUGE drill and tap (probably 9/16?), and will probably cost a
fortune. Did the CCC carb systems use a MAT? I didn't see anything that
resembled it on the intake. I may place it in the intake tract for a more
accurate gauge of the temp without interference from the exhaust crossover,
and it might be easier than drilling the intake!

Chris.
----- Original Message -----
> Do you have the 76-77 cast iron intake with 2 1/4" throttle
> body openings, or a 78-80 aluminum intake (highly prone
> to coolant leaks) with smaller openings?  Those 2 temp
> sensors are identical, not directly compatible with anything
> else, are highly prone to failure, and hard/expensive to get.
> But there are plently of places in the Olds intake to drill
> and tap for modern sensors, which is what I have done on
> my 403.  Using the original fuel system here on my 79
> Eldorado, but modern ECU for sequential port injection.
>
> Bruce Roe

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