95 7427 with BPRK

Would like to just for the hell of it start off with my stock tune adjust on my Suburban. It's a 95 with 454 and 4l80e. The stock chip is BPRK but due to it being in the stock memcal I don't know how to go about reading it without jury rigging some pins. I found another thread where EagleMark said originally it was BMHM, then BPRK and then CAJR. I however cant seem to find any of the bin files here or on the rest of internet. Ideas on getting the stock bin, or does anyone have it?

Here is what I use to read the EPROM in memcals. https://www.amazon.com/Generic-Break...NsaWNrPXRydWU= Insert in memcal at the EPROM location and read in a reader of your choice. I have a Moates Burn 2 and one of the Willem units to program/erase the Winbond STMicro knockoff chips. You could also purchase an HDR1 from Moates but I am cheap :)

HTH
Brian