lol, too bad DD doesnt sell 5/8 ID tubing. methinks it'll be too expensive to order from McMaster....o well.
i wonder if 5/8 tubing can stretch on the 3/4 intake? would save be the troble of haveing to mod the heater core......
here is a link to a pic i made of what the distro block might look like:
http://www.geocities.com/cyc0_dud3/crap.html
if it doesnt work, then just copy n paste the URL into ur browser.