1.6 or 1.7 rocker arms?

Next up, for the short term, is upgrading my rocker arms (should've been done when I did my heads, but oh well)......w/ what I currently have, knowing I'm gonna be s/c next year - what size/make should I get and why - 1.6? 1.7? Crane? FMS? Thanks for your replies in advance.

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'90 LX 5.0; 12K original miles (no sh*&); 3.55 gears; pulleys;Edelbrock Performer Heads; BBK shorties; MSD 6AL box w/ blaster 2 coil; Motorsport E303 cam; Pro-M 75mm MAF; BBK 70mm TB; Eibach spring kit; Southside welded subs; K&N cone filter charger; Hurst shifter; fiberglass turbo hood; A/C-less; rear seat-less; cat-less; 2 chamber Flos; Corbeau racing seats (fronts);
30# injectors; JMS Chip; 190 lb fp; TFS track heat Intake (12.299 @ 113)