273 Commando Engine Build
I built my street legal 273 Commando with solid competition Isky camshaft (advertised 312 duration and .580 lift) and stock '65 heads (but used a 340 Edelbrock Tarantula which fit by elongating the holes slightly) and 600 CFM double pumper Holley. Was a four-speed with 4.56 rear end. TRW dome pistons (factory profile). Then the unequal length Cyclone headers. Must have been good for 300+ horsepower. Best quarter mile at Fremont Raceway circa 1976 was 12.72 ET at 108 MPH (third photo is after I sold it in 1980 when the new owners [Renteria Brothers] replaced the 273 with something larger).
I built my street legal 273 Commando with solid competition Isky camshaft (advertised 312 duration and .580 lift) and stock '65 heads (but used a 340 Edelbrock Tarantula which fit by elongating the holes slightly) and 600 CFM double pumper Holley. Was a four-speed with 4.56 rear end. TRW dome pistons (factory profile). Then the unequal length Cyclone headers. Must have been good for 300+ horsepower. Best quarter mile at Fremont Raceway circa 1976 was 12.72 ET at 108 MPH (third photo is after I sold it in 1980 when the new owners [Renteria Brothers] replaced the 273 with something larger).
