Don't happen to know what a stock-block 351W with aluminum heads/intake weigh do you? I know it is less than the 289 it replaced, but curious if anyone knows HOW much, probably not a lot and any gains I made are easily outweighed by the AOD (versus C4) and or 9" (versus 8").
You probably lost about 65lbs (40lbs in the heads and 25lbs for the intake - isn't that about what you said you lost over the summer?). That would put the 351 very close to the 289, maybe 10lbs under.