Rep Power: 861

What is the life expectancy of a 305 and 350. Lets say I start off with 70k miles on a 5.7 how much longer would it last to reliably?

 
Rep Power: 1126

I just looked one up for a customer and most were around 150k for sale a bunch well over 200k if you change the oil regularly and do maintenance it will last for a very long time, a 305 won't last quite as long typically though. My last 350 had 375k on it when I rebuilt it, and it still ran well in an old farm truck

 
Rep Power: 861

ok thanks

 
Rep Power: 875

your really interested in getting a 3rd gen finally eh

 
Rep Power: 824

with good maintenance, get well over 200,000

 
Rep Power: 789

Depends on the driver.. and the mechanic.. i race mine... I change oil every 3 months and spark plugs as well..

 
Rep Power: 875

whats the point in changing the plugs that often? is it really necessary?

 
Rep Power: 789

Shifting at 5500rpm.. um.... yea

 
Rep Power: 729

my friends daily drivin 305tbi hit 175k and hes still making the power he made at 70k around 250hp. if u maintain it it will last.

 
Rep Power: 1126

that is very unusual for the 305 the small cylinders and the bad cams tend to kill them faster

 
Rep Power: 789

Theres no way the 305 TBI made 250hp.. they had around 175...

 
Rep Power: 735

Ive read you can mod those out to almost 375 horse natuaraly aspirated

 
Rep Power: 875

im with this guy

 
Rep Power: 735

but stock I think the most was 190

 
Rep Power: 1126

most 305's make about 120 stock the cylinder bores are too small to be real efficient