You may need these, they will need to be shortened about an 1/8" depending on the washer and gasket you use, and be sure to clean and retap your heads. Assuming you have iron heads. check your threads before installing the motor, heli-coil if they are in bad shape.
5/16-18x1-1/4 Alloy...
I have dougs in my 64 dart. works fine, you'll need a different fork and a mini starter and probably a different steering coupler. If I had to do it again I would go with a hydraulic clutch.
PS I have power steering.
I have a 340 in my 64 dart and everything is a pain in the A$$. I have power steering and a 4 speed with dougs headers. Well to be honest I had Wagons did most of the work and I think he was considering going Chevy after this. just kidding. You should also widen the radiator because you...
Oh trust me I have spent a lot of money at Brewers most recently I bought a 904 slip joint for $120, then 2 days later 3 were posted here for a third of the price. So I thought I would ask first before ordering.