whats up everyone...

welp ive been lerking arond here for a few weeks figured id drop in. well i have a 94 chevy ecsb 2wd. it has a tired old 305 with 265k on the clock and a lil valve noise. i have a 385 LT-1 just about finished and then i need to get a tranny afterwards before it goes in the truck. but im lookin for any info as far as a way around the opti, and also what about the wiring harness? should i find a 94 roadmaster/caprice/impala ss wireharness and computer and just use that? and for guages ill be buying all new autometer as my factory 5k tach wont do me much good with a motor that will wind out 6500... any info would be great guys. thanks.. Jameson