Yep,,,my block has those ridges <img src="/forums/images/graemlins/smile.gif" alt="" />. Shame is my H.B. destroyed the Crank Snout with only around 25K on it. <img src="/forums/images/graemlins/barf.gif" alt="" />.
I also just reralized I forgot to drill and tap holes for the oil pickup mount. <img src="/forums/images/graemlins/scared.gif" alt="" />

On MPI system and sequencial injectors:

I was under the impression that seq. inj. gave a little more performance , as in lees pollution and a little better gas economy . In 90 CA dropped the EGR . I thought this might be cause emmissions and milage are improved with this system. Maybe thats just a CA thing. Mine is from back East so its a fed. ECU. I run alittle richer , I think.

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.