Quote Originally Posted by glennsexton View Post
Look at this thread before even thinking about converting to splayed caps. It's a big undertaking and for almost all engines short of full-tilt dragsters it's not necessary.

Splayed 4 bolt upgrade

Note that Pro-gram link is defunct - go instead to American Made - American Proud: Pro-Gram Engineering Corp - Manufacturer of Race Engine Parts - Home
milodon cap or howards make caps now its not a big deal i done many of the 2 bolt to 4 it is more of a time deal if you have it done they need to watch were they drill as they can open up a main feed to the main . if you know your going past 700 hp then just buy a big m block when all siad an done you would be very close to 700.to800 cap job fitting the caps drill and tap block aline bore easy 400. and caps are 240 for the 3 main caps in milodon 400 for howards cap 1threw5 . as for Pro Gram there cap are some of the best and howards are right there with them . i am dealer for program and howard my catalog 2012-13 shows there still making caps ? not sure they were off line i hope there back up and runing i use to buy timed out off shore race blocks. just about all them had program caps but dart makes there own caps and many do so that may have been a big cut in them making caps