Be sure to include some S-shaped bends somewhere if you go with hard lines. Running them too directly from the block to the filter can result in lines cracking near the end fittings due to vibration unless some flexibility is built into them. A 360 degree loop is even better than an S shape.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!