Originally Posted by Cab_Burge
Nine second Phil had a 1969 340 block that had one lifter bore,#5 o r#7 intake, that wasn't machined properly from day one, it would eat that lobe after around 15,000 to 22,000 street miles puke
On your friends block I would remove the timing gear and rotate the cam and lifter by hand or maybe with a big drill motor to make sure the lifters are all rotating well scope
If they don't spin well have the block lifter bores bushed or go with a roller cam and lifters twocents

This is not a new build. The engine has had two different cams in it already without a problem so I can't see how this would be a block problem.

"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.