wiper arm /blade length for mot

[dan23]

i ve fitted a ax wiper motor an need a wiper arm

what lentgh should the arm an blade be
i planning on making a smooth arm out of ax ford an pug arms an tig welding them together:wtf:

[Steve0011]

as long as you like as long as it does'nt foul anywhere

if you have a sunstrip they have to miss it AFAIK