[2manyT/A'S]

Originally Posted by Super Duty D

2many,

I'm thinking valve springs..... could be carb though, you have a valid piont. Maybe I sould experment with the extra SR SD carb I have, just to be sure....

Any other thoughts...... anyone......

SDD

Those SD carbs are pretty HEAVY with all that emmissions CRAP on them....

Try one from a LATE 70's 301,they are bigger & should flow some better #'s than the SD carb.