Can anyone tell me what the difference in HP, torque, or just the overall difference in power is between an L26 with roundtops vs an L28 with roundtops? Both engines are stock except bolt on stuff( headers, exhaust)and the L28 is from a 76 with N42 heads. Thanks Chris.

Should be good for about an 8% increase if all things are the same, compression ratio, etc.

Should be good for about an 8% increase if all things are the same, compression ratio, etc.

2.8 / 2.6 = 1.0769

Is it as simple as that?

Well that would be a nice improvment and the fact that my L26 smokes some it may have even lower compression then normal so the percentage may be even more. 8% I think is definatly going to be noticable. Thanks for the input

Yep, so far as I have been able to tell that seems to be about accurate.