I have the XR274HR-10 in my 383 now 438. I also used the Comp rollers. After reading the above comments I feel lucky.

So far I have a total of 2,849 miles on the rebuild and 58.9 hours on the engine. I added a Hobbs meter (engine hour) gauge to keep track. I have had no issues yet. 99% of my driving is cruise as I live in souther NM. The engine has never seen the north side of 5200 rpms.

But that's just me.

Just my

Frank

Remember - 2 wrongs don't make a right - but 3 rights make a left!