aluminum main caps on 400 block

[mopardave]

when building a street 499/512 11.0:1 engine,440-1,under 7000rpm, are the aluminum main caps nessesary or can you use the stock cap with studs? 650/700hp deal once or twice/yr to the track. girdles or block fill required in a build like this? thanks

[nss7561]

Aluminum caps would add some reliability, nut are not necessary in this build. I would use them over a girdle
Block fill optional, I would do a short fill on the street, not a full fill