how powerfull is a 350 1970 chevelle?

Answer 1

There were two 350's available in '70 Chevelle's. The 250 h.p. two barrel L65 and the 300 h.p. four barrel L48.

Answer 2

This was about a 327 Horsepower engine in it's day, I am sure that it's lost a bit with wear and tear but with the proper rebuild that engine could be a sweet little prize.
It wasn't as popular as the 396 or 402 in the shevelle but it was still a strong engine.
If you are considering rebuilding I would replace the original heads with high performance 202 heads, also replace the cam and cam bearing using a 470lift 296 duration cam at least. Then use a after market midrise plunem intake from edelbrock and replace the Carerator with a good AFB or Edelbrock 4 barrel. Also use A good set of Headers.
And if your really serious, then replace the pistons with a aluminum 11.5:1 domed piston and new rings and bearing replace the rod and main bearing and get lightweight Rods.
Also have the motor balanced and use a fluid harmonic balancer.
Then change the rocker arms and lifter to solid lifters and increase the lift on the rockers with better then a 1.97 lift.
Sorry i got so involved I have been building these along time and I just love the old SB chevy's.

Answer 3

Depends on your definition of power and if it is the original engine,some people base power on torque some on horsepower,either way the 350ci is the standard for small block Chevrolet's and they made reasonable power,In a recent article Car Craft did a horsepower breakdown that included a 1971 350 LS engine it was advertised at 316hp but it could only pull 293hp to the rear wheels,they can measure horsepower at either the rear of the engine or at the rear wheels,this may be the difference in the advertised horsepower and actual horsepower,they are good engines and you have a thousand options open to you if you plan to modify it,have fun and good luck with it.