Oil accumulator line size?

Purchased Moroso Oil Accumulator and hardware. When I first read the instructions they said "use -8AN stuff, it will be sweet".

Now that I have bought all -8AN line and hose ends, I just re-read the instructions and it now says "All oil lines should be made up of -10(5/8 ID) hydraulic high pressure hose".

I'm assuming the -8 stuff that I bought will reduce flow etc, but is it a deal breaker? If I use the -8 gear will I be creating a large problem for myself? (440 engine)

(my plan was to run the -8 hose/-8 hose ends from oil pump->remote oil filter->oil cooler->oil accumulator->back to oil pump etc. etc.)

Thanks in advance

Bad Shrimp