ka24det e85 help

[nismo91blk240sx]

i plan on running e85 on my built ka. im going to be using a bosch 040 in-tank fuel pump, injector dynamic 1000cc injectors, and aeromotive fpr. now my main concern is whether to use -6an or -8an feed line from the pump to the filter. ive been told -6 would be fine but with e85, i should go with -8 instead. does anyone on here have a similar setup? or have an educated explanation of what size feed and return to use? any help will be greatly appreciated.

thanks

[s15specR]

I have same injectors. FPR and pump on my SR with 6AN lines never had an issue, made close to 600hp.