I agree. Key word is “ with mild modifications”
Smogger motor with pistons way in the hole, stock smog heads, highway gears, stock cam and convertor, etc, aren't what would normally be considered “ mild modifications”.
Usually it would be an aluminum intake, gears, camshaft with some lift and duration and maybe a “ streeter” type 10 inch convertor. Least that is my experience. What were called bolt on’s in my world
I had a bone stock 70 Duster not all that long ago. 54000 miles, factory 340 bench seat car. Factory heads had never been off of it.... ultimately it became a sleeper uncut/ untubbed full interior 9 sec car a few years later
My first effort to make it faster was 3310 carb, dual plane intake, hughes 230/238 hydraulic cam, 3k Coan convertor and 4.10 gears. Weighed about 3420 with me( i am 6’5 300+)
I remember well the night it broke into the 12’s with the above mods. Stock 340 shortblock that had never been apart and factory rocker gear still. Shifted it off the column had rev man valve body. Remember how happy i was. Nearly 1.5 sec gain over bone stock like it was when i got it
