Removal of fuel pump

Please help. I just bought a 1955 M38A1 that was supposed to be 90% restored. It's 10% restored, with a new paint jpb. I need to replace the fuel pump, which is not original. I can remove the right-hand bolt easily, but there is no way to move the wrench when I get it on the left hand bolt. What am I missing here? the engine mount and the fuel pump block the wrench, Can someone tell me how to remove it?
Thanks,

I will be fiddling around out in the garage tonight, I'll take a look at mine and report back.

Welcome to Steel Soldiers!

There were special bolts originally on the M38A1 which had an extended head allowing the use of an open end wrench to remove and replace...the hex head was extended about two inches so it stuck out and was easy to get at... I think Brent Mullins in TX had some oem ones. The original pump had two diaphragms, one for fuel and one for vacuum for the windshield wipers and a manual lever for priming the system after it had been sitting a while so as not to drain the batteries with incessant cranking...

Ah, that crafty old Ace beat me to it..

When I looked at mine, there is a normal bolt in the rear side (nearest the firewall), but in the front there is a looong bolt like what Ace describes. I think it would come out with a 1/4" drive sockt and a short extension.

Thanks, I tried 3/8 and 1/4 sockets, and no matter how thin the socket, it hits the body of the pump, and won't cgo over the bolt head. There's room for the extension, but not for the socket. I can get an open or closed wrench on it, but then can't move the wrench anywhere.
I'm beginning to think it was put on while the engine was out. I've spent this day trying to get that one bolt out.

I have gone as far as Grinding a little off around a Socket in the past on certain jobs. Makes the walls thinner. You can try that and or put a wrench Length wise on the bolt and turn it with another wrench. Good luck, Phin