1/4 inch in any direction is not going to make any difference on a ply bass-plys are actually stronger than solids and as for moving the bridge away from the bass bar-
look, in this situation-this situation- there is not a lot of concern about doing it right or the op would get a good bridge, with adjusters , a good set up - until the op takes it more seriously, moving the bridge 1/4 inch forward, shims , whatever should be temporary fixes- the best advice is- get serious about playing- get it set up right , respect the instrument and have fun playing without extra noisy.
op, just trying to be helpful - not trying to start a big argument over this-
btw, i have seen bridges moved an inch forward and stayed that way on a ply bass for 20 plus years and it didn't hurt anything- post was also moved. btw, not everyone will agree that the bridge foot has to be right on top of the bassbar anyway.
me personally would not do that(i would get it set up right and be done with it) but a 1/4 inch till the op gets serious enought to get it done right-is okay-
btw, shims need to be fitted- the op is looking for an easy way and moving the bridge (for him) will be the best, fastest and easiest way-
the best advice is - take it to a bass luthier and get it set up right- might not take all that much- surely you could go get a free counsultation and find out
most likely a luthier would dress the E side of the board correctly and you would be on your way
pm sent to op