Futral set mine to shift at 5800 amd the rev limit at 6200.

I'd ******* spray it if I didn't have a stock transmission,stock converter, stock gears, an open differential, and stock manifolds......


EDIT-****, I'm depressed, now I'm gonna go down this case of Keystone.

Stock shortblock will live at 7k as long as the oil is kept up. Dont let it live on some old oil for 12k or better, you will then be on borrowed time.

This is experience telling me this. The bottom end held together on mine even after this, it was the wrist pin that I had problems with.

mine was the piston

mines got 118k on it, I'm getting ready to throw a cam in it. How much would arp bolts and a ported oil pump run? Is there anything else that'd be a weak link for turning it to 6600?

I shifted my stock bottom end 5.3L at 7300rpms 1-2 and 2-3. Had heads and LPE GT-1 cam, and stock springs. After 75k miles of this and a 225 shot I finnaly spun a cam bearing.

I know a circle track motor builder that sells 5.3 and 6.0 GenIII stock car motors that are completely stock short block with only ARP rod bolts and he rev limits them to 7k. They even warranty it for a year, unheard of in racing. These motor turn 7k lap after lap.

damn i wish i could get my circle track motors warrantied

Get your track to let you run injected motors from these guys www.schwankeshortblocks.com

talk about an underdrive pulley..haha..