Originally Posted by 95chevy406
The guy said it ran good with no noises.the pistons only had very litle cabone on them.guessing less then 30 min run time.is it good to use 2 bolt caps on a 4 bolt block.the sound was coming from the # 1 or 2 piston.my cam is only a .435 .465 lift.
What do you think the guy is gonna say when he's trying to extract money from your wallet??????? He's gonna lie through his teeth. TRUST NOBODY.
When the 400 blocks were produced, some were manufactured with 2-bolt mains and others were produced with 4-bolt mains. Of course the hot rodders immediately grabbed the 4-bolt blocks because they thought they would be stronger than the 2-bolt blocks. But hold on there, gasoline breath, it was discovered that the webbing in the 4-bolt blocks was not sufficient to prevent pulling the whole shebang out of the crankcase and runnin' over the crank. Oddly, the 2-bolt blocks were stronger and have been used ever since as the block of choice when building a 400. If your block is an original 4-bolt block and has been built using 2-bolt caps, it's still a 4-bolt block with weak webbing above the crank.