The big 'F' on those chips is the Fujitsu logo.
The '8005' is likely the manufacture date code, 05th week of 1980.
'MB8516' is the Fujitsu part number and if you web search it you'll find it's their version of 2716.

Read these ROMs in your programmer and save the files.

You can use the following site - you'll need to upload the files. Personally I do CRC32 fingerprint checks on the ROMs and compare them locally to info I have but it's not so so straight forward to explain here. PinMAME is also a tool you can use locally to ROM Identify them yourself.
http://www.arcaderestoration.com/RomIdentification.aspx

If all this is too hard, just send me the ROM files and I'll tell you what they are.

Yes. Just read them as 2716 EPROMs and send them over.

I need to build the adapter. It's going to be a wire spaghetti so will take a good few hours when I get some time.

I don't think the EPROM identification through the burner device did not start until dip28 sized chips. My gq-4x at least will not identify 2716/2532/2732. Says device not supported.

If your burner does not have the device MB8516 profile available the generic 2716 25Vpp or the MBM2716 will work for that chip.

If I was going to make a combo ROM device for use on the bally MPU i'd probably do something that plugs into U9 slot or J5 so you wouldn't have to hack and slash on the MPU board. I think you can recreate the EPROM chip enable at the U9 socket with one 7400, one 4049/7404, pullup resistors, and a dip switch bank to move around the upper eprom address to game select. With a proto board it would be a lot to wire up, but doable. The EPROM pins line up decently the CPU when you rotate one of them 180 degrees.

barakandl the combo ROM discussion started here

https://pinside.com/pinball/forum/topic/combo-rom-for-original-mpu-boards

Bob,
The U2 ROM is: E723-17.U2
the U6 ROM is: E720-20.U6

These ROMs are the earlier "-17" version of Eight Ball. I first dumped these and uploaded to IPDB about 2 years ago. The database in the web site I linked above is about 3 years old and doesn't know about these.

I cant wait to get to the level you guys are at so I can understand what the heck you’re talking about

I think the U9 module eprom enable could be as simple as this. NAND chip 74HCT00 and you shouldnt need any pull up resistors on the daughter board.

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For the EPROM to make combining roms go in numeric U1, U2, U5, U6 order, EPROM typical A12 is wired to CPU A11 and EPROM A11 gets wired to CPU A14. /CE is grounded. Then wire up the rest of the address pins used typically on the MPU EPROM. The left over upper most address blocks route to a dip switch with pull up resistors so when the switch is closed that address is grounded. When the switch is open the address is pulled high. That will let you select 64K chunks of ROM in a bigger chip.

Build the 7400 NAND, EPROM socket, CPU socket, and dip switch on a proto board. Use socket mating headers to plug into the U9 socket.

Ouch!!
Has pin 4 been cut on the chip itself maybe? (top side of the board)

I've seen that method done before - maybe it was normal practice at some time.

That's factory, I've seen that before. Haven't looked at what it's for.

It's actually a capacitor. Yes it can be hard to tell the difference but usually the two silver color bands are a bit of a giveaway. I have some Bally MPU boards that have all capacitors in that style.