Are 74ls374 ok for the octal latches?
For the hi programming voltage l will use a computer psu..
Any other things I might add?
I also I contacted sofi about and they replied by saying they can't do anything about it...
According to the datasheet I just read, the logic input 1 voltage for the latch can be as low as 2V. It will also work with the EPROM. So, the 3.3V Arduino can send signals to these devices.
Where you might have a problem is the fact that the EPROM output voltage can be higher than a 3.3V Arduino wants to see. You could try putting some resistors in series with the data signals. I don't know what size and I wouldn't recommend it anyway.
So, get a 5V Arduino and keep everything at the same level. This Pro Mini is 5V and there are others:
https://www.sparkfun.com/products/11113For this board, you need some kind of programming adapter like this:
https://www.sparkfun.com/products/9716Notice that the device puts 5V out onto the programming header so it will power the Arduino from USB if you wish. There's a jumper to select that voltage, see the schematic.
I might not use that 5V supply working with a box of parts like this. I would rather protect my PC. So, I would cut the jumper (or somehow prevent the adapter from providing +5) and power the project with a 5V wall wart.