$600 to $3,500 depending upon how involved you want to get with the thing. Generally, for a “good” rebuild that doesn’t really get beyond ‘mild 350’ standards, you’re looking at about $1,600-2,500 depending upon location.Click to see full answer. Furthermore, how much does it cost to rebuild a Chevy engine?A typical engine rebuild is between $2,500 and $4,000 in parts and labor costs. how much does it cost to rebuild a Chevy 305? With the quotes so far for rebuilds of the 305, range anywhere from $1100 to $4000, from basic rebuild to upgrading pistons, rods, cam and so on.. Additionally, how much does it cost to rebuild a 350 small block? A re-build kit is $500, another $500 for machine shop work and then labor/time to rebuild it. If the engine was “blown” then you also need to replace any broken parts; it is very possible that the block was damaged beyond repair.Is a 305 worth rebuilding?My advice is to not spend a dime on a 305 shortblock beyond rings, bearings, and oil pump. If it needs to go to a machine shop for anything more than tanking, just get a 350. 305 heads are worth rebuilding, even for a 350.

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