* 3782870: This is a 4-bolt main, 350 cubic inch (5.7 liter) block. It was produced from 1970-1979. The exact year would require further investigation based on other markings (e.g., partial VIN on the block).
* Passenger side block conv1: This likely refers to a one-piece rear main seal configuration, common for blocks made during this period.
* Front machined pad T1012S: This refers to a casting mark on the front of the block, likely indicating a specific machining operation or quality control code for that particular block. It's not directly indicative of the engine's specifications.
In short, you have a fairly common 350 small-block Chevy block from the late 60s/70s. To get a more precise year of manufacture, you'd need to check for additional identifying marks, such as partial VIN stamping or codes stamped elsewhere on the block.
