Finally going to take the time to post some pics on the blown 489 I'm building.
The engine is as folows:
Mk IV BB Chev, four bolt, + .030
Eagle 4.25 forged crank
Probe 6.385 H beam rods
Probe SRS forged flat tops w/ JE rings
Clevite H series bearings
Rollmaster timing set
Romac Balancer w/dual keyways
Custom hyd roller, Morel lifters
Stefs aluminum pan, Melling pump (supplied w/the pan)
Canfield 310 heads w/ severe duty valves, hyd roller springs and Ti retainers,
Crane gold rockers and Canfield stud girdle. Heads were done here in my shop...they came with guides and seats unfinished. 5 angle intake valve job, radiused ex, bowls blended, chambers CNC'd by Canfield. Heads flowed in the 360/290 range @ .800. Decent for a simple bowl blend. Ports were untouched.
Blower is a BDS 871 package w/ (2) 850 Holleys prepped by AED. We'll see how that goes.
Ignition will be MSD small dia. dist w/ Crane HiFire 6 w/ rev limiter.
Block prep...remove all the casting flash and blend all sharp edges. Normally I do this before machining. Block was fully machined on a CNC and the final bores were honed on a new Rottler hone. Mains were also aligned. Everything on the block checked dead nuts.