Colbalt... when your $5K motor comes unglued you are out $5K.
When a cheapy stock/near stock based motor comes unglued you are out a few hundred dollars.
Yes you can make 700hp from a 355 with a 671
but you are not going to do it with 350hp parts
the best high flow 23deg sbc heads money can buy.
two 750cfm blower tuned carbs
mechanical roller cam with 250- 265 @.050 .600 lift.
14 psi boost.
forged pistons, blower preped crank
The easiest, most dependable lowest cost over time method to do this and get 700+hp is to use methanol fuel.
10:1 cr for methanol.
A realistic 650+hp can be achieved with 7.5:1 cr and 94 octane gas.
Last edited by F-BIRD'88; 08-19-2010 at 12:20 PM.