1973 duster 340 valve intake

hi, 340 makes 410 H.P. with 1.88 int valves, mopar stainless. the 1.88 has more port velocity , therefore, puts more air in cylinders = more power.
for the street, the 1.88 is more than enough!! on the qualifing sheet at gainesville, 340 ran 10.98, was a 72 or 73 duster stocker.