looks like you're about there.  I need to get back out to Glamis.  Was incredible fun!

a mostly stock 89 with a high-flo filter and an FMF pipe will prolly need about a 380 main but it's always good to start fat at you stated.  25 pilot sounds about right.  You'll prolly need to adjust the air mixture screw a bit to get the idle perfect. 

While you're at glamis, test your needle height as well (half throttle plug chops). 

Have fun - seriously jealous here.