I love my small blocks. I went 9.90 na at 3300 lbs with a stock block 4 inch crank and Indy 360-1. That was 12.5 to 1 motor so I ran it mixed pump and race fuel. Now I upgraded to a R block and go 9.43 na at 3195 on pump gas. I add a single stage plate to her and she will run 8.56@162. I only shift it at 7000 so I dont think its a high manteince motor, same valve springs last four year and still pull the same.

I loved racing 10.0 index with it two years ago, I would shift it at 5500. Think it would have lived a long time running that class but I built it to go faster.