cost
Porting my 700 cost about $900 Canadian and there was a notiable difference. Putting a non power valved 700 motor or top end may be just as cheap if you buy used on this site. I have had no problems with porting, single headgasket and SLP triples at 8900 on a 700. put on over 8,000 ks with the porting and total of over 12000 ks all together and still running.Someone on this site had ported 700 cyls for sale so maybe check that route out.