Quote: I would rather use top end restricter, return lines or a accusump system then flood the rotating assembly with return oil.Our own Indy aluminium blocks have literally 4 to 6 seasons on them and 100s of passes,the last count my 588" had 686 passes and Don's 605" was approaching over 500 passes.Pap Ross,Chaz and other have the same reliability. Go figure
On the wide pan rail Indy block. Is indy the only ones that make a pan for it? (Dragster style) Bob, your making me lean toward a 605 instead of a 572 for our Dragster. No power adders.
Go figure 
