A friend of mine owns a 66 coupe with a 289 engine. Most place rated this engine at 200 horsepower. He has had his engine rebuilt, bored .040 over, performance cam, 4 barrel 600 cfm carb. It really is a strong engine now. Anyone out there have a guess on how much horsepower these alterations would add. Just kind of looking for a good guess.

 

290-310....thats with a really nice dual plane intake and dual exhaust with headers.....ya got any of those??? That cam really makes the numbers jump.

 

a 66 came stock with 200(if you rated it SAE) and gross numbers were 220 or so, so i bet you're putting out 290 at the flywheel

 

250 fwhp