hi, I am putting together a 355ci sbc... (350 .030" over) and I bought a brand new 10-10 crank and new +.030" pistons, and new rods for it... will it all have to be balanced??? if so, How much does this usually cost???

Thanks!!!

yes have it balenced, i believe mine cost around 125-150 to have it balenced

It depends on what you want to do with the motor. If it's going to be a mild mannered street machine it doesn't have to be ballanced. The SB350 is an internally balanced motor. If you use the same rods and crank, you shouldn't have a problem. This isn't necessarily the same advice I'd give for an externally balanced motor (such as the 400) or a motor that will be driven hard.

-dnult

i would balance ANY engine that i actually cared about. sure, it might be a stock replacement engine going into a car with a stock torque converter and stock rear gears now, but what about later when parts get upgraded and you want 7000 rpm anytime you want it? the $125 is money well spent.

Get it balanced! I had a truck engine (355ci) rebuilt in high school and I didn't see the need or have the funds to have it balanced. But I had my Camaro's engine balanced (355ci)and it's a world of difference. Not only does it rev higher and faster, but it's oh so smooooth. :D

if the motor is apart its a no brainer! have it balanced. mike

A balanced motor will life long and happy, but I did notice, same cam seems more tamer.

If you got the cash get it balanced. If not I don't think its too big of a deal unless, as mentioned above, you're making a crapload of power and spinning 7000+RPMs.