I would degree it, it will increase your skill level & you will KNOW its right & you'll know the procedure when you get into wilder cams. As 440sixpack said a positive stop is very important & if your heads are installed Mancini sells the spark plug positive stop for cheap & I would add a 5 cent green or yellow(I forget which) plastic vacuum cap to the stop to keep from possible nicking the aluminum piston top & turn the timing marks to 5BTDC then screw in the stop until it firmly contacts the piston then turn the crank by hand in the other direction & see if the piston stops at 5ATDC. With that being said I've never(yet) encoounterd an error greater than 1 degree but others have found major machining errors & I dont leave ANYTHING to chance.