[antyates]

well if main caps say c90e, this is good the 69 block is blessed with more nickel and thicker caps, you need to find out what kind of cam and its specs, them procomp heads are going to have to be beefed up (if you brought put together) if this 351w was pumping out 550 @ rwhp you can bet the cam is over 600 lift, them springs on them heads are not going to work, great intake for the heads and set up, oh yeah your probaly going to have high compression, 69 block is 9.480 high and your heads are 60cc, and them flat top--yeah high comperssion, alaska got 110 octane??, you need somewhere around -14cc dish pistons to get running reg. gas
my advice find something better to suite your heads and something closer price is a little to high also