I have been working on my stock Memcal. I pulled the chip and was about ready to install a ZIF socket on the carrier. I have been debating whether to put the ZIF or a regular 28 IC socket. The socket would sit lower on the carrier, but would require some force to remove the EPROM. I wasn't too impressed with the quality of the ZIF socket. The legs were short and kind of "flimsey".

Anyways, tonight I pulled the ADS chip that is currently in my ride. I popped the cover off the carrier, and low and behold the EPROM is allready in a 28 pin socket, which was soldered to a PC board. The chip itself was not soldered to the socket, so it just popped out.
Therefore, what I have decided to do, is pull the socket off the ADS carrier, and solder (and glue) the ZIF socket in its place. It should be real simple, plenty of clearance around it, and I will get good solder joints. Then I will put the low-profile IC socket into the stock GM carrier, so I will have 2 different methods of swapping out new chips. That way I could have a backup if one fails. The GM carrier seems to be a little more "rugged", but they both should work fine.

I really want to see what programming differences there are between the GM chip and the ADS chip.
(Pocket Programmer is on order!!)

I just thought I would pass this info on.

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Best ET 14.413 @95.57 without
pulling valve covers or manifolds.
Also with stock 2.77 rear end!!!

 

It seems some ADS chips are like yours and others are not. My ADS chip was soldered in. Possibly it is a difference between the ADS chips for the MAF cars like yours and my SD car.

Good luck.

 

That's interesting. I pulled the socket off the ADS carrier today, just need to check clearance with the ECM before I solder the ZIF down.

On another subject, I received my Pocket Programmer today. Can't wait to start looking at the code on these 2 EPROMs!!! I am sure I will be making some posts on this board.