Thanks david always a help.
So bit the bullet and bought the adjustable 1.6 ratio rockers from vintage and will use them on the stock cam with stock 289 springs. The discussion for 4 mains vs 7 mains has inspired me to take it to the extreme, and start amassing everything i need to build a "performance" 170 with full balanced rotating assembly upgraded schnieder cam with dual valve springs 1.6 ratio rocker modified log manifold for a weber and lots of head and block work, double roller timing setup with a recurved DUI from for the 1/4 drive im hoping to turn 6k on this little motor and switch it to a s10 T-5 and an 8 inch that ive already started shortening with posi. Would be a sweet little set up. Though i do wonder whether a modified log for direct mount weber would work better or the Offy triple single setup.