1/4 by 20 bolts?????? i ran a hemi dart in 73-74.there is no comparison in what we have now. kinda like a ford falcon to a pro stocker. the cow done left the barn. great cars still!! seems we all have to have bore and stroke, head cc's port and chamber, etc. carb spec's. are we and nhra majoring on the minors? has to be a fair solution. thanks to everyone who try's to run one of these things.