600 holley is topping my 323" has the 340's cam .430 / .444" lift , And Edelbrock " streetmaster 318 " single plane 0-4800rpm intake. Using the 1.88/1.60 heads , 4 speed, and 3.23 gears its a nice package. In a 4 dr 70 valiant family econo box with 225/60 tires it went 14.89.

As fast as the first 4 gears of a stock 90's 5 speed 5.oL mustang.

Fast as a 77' 4 speed corvette with a 350 v8, performer intake , cam , and stock 3.36 gears.