Verify your timing chain installation. I recently dummied-up a timing chain install on my engine and it absolutely refused to fire. Finally posted a picture of the chain installed and a couple of the guys here spotted a problem with my installation. I was using a multiple keyway (Rollmaster) timing set and had infact aligned the dots correctly but had a major brainfart with all of those keyways and the cam/crank relationship. Its a lot of reading but here is a link to a thread I put up about my problem and how I got it resolved  . The solution was in about 6 or 7 pages, but its interesting reading all of the way through.
Davids thread.
 in my case
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frittering and wasting the hours in an off hand way....
1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. 
Last edited by David Jones; 08-12-2005 at 09:06 AM.
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