The 283 has a 1/8" pipe thread beside the distributor for oil pressure. There is an adapter available to go from the pipe thread to a compression fitting on the oil pressure line, which is usually a 1/8" or 3/16" OD copper tube. Most well-equipped parts stores will have an assortment of brass compression fittings, but don't ask the mouth-breather computer jockey at the counter to help you find the right fitting. Look for the gray bearded oldtimer who knows how to read a paper catalog and has more than three brain cells to rub together!

Here's a pic:

http://thumbs1.ebaystatic.com/d/l225/m/mzt9noGWhLIpvHypH0gas4g.jpg

Good luck!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!