Yeah they sound like great engines, but i would rather modify a block then have to cut up my engine bay since a 250 is already usually a pretty tight fit in an early mustang. Plus the number of parts i would have to keep on hand is also troublesome. Even if they are easy to work on i would have to keep multiple spares for everything from water pumps to distributor components because if something broke and i did not have it i would have to either pay huge air shipping costs or wait 3 months for it so arrive in a crate. I have a 1968 bronco that is going to need a new engine and we had planned on using a 302 but maybe we would look into one of these gems. The crossflows still seem fairly popular in some circles and a lot of times working with an engine that others consider out dated is a good thing because it allows you to find used parts cheap!
So i am now looking at crow cams 14650 or 14892. I want the first one but think the last one might fit my engine better.
The 14650 has 230 advance, 113 lobe separation, and .522 valve lift. It describes the cam as follows: Rough idle, excellent mid range power. Needs
improved breathing. Power is supposed to come in from 2800 to 6000 which is taking the power range rather close to the limit of our stock bottom ends, but i did some reading and this appears to be the cam that xrglen used to put in his 300 hp build, but since i dont plan on doing anymore port work than just cleaning up the ports it might be too much cam for my engine.
The 14892 is designed to get max performance from street engines which sounds good so far, it still requires aftermarket springs and retainers, but it only has a duration of 214, lobe separation of 112 and a max lift of .510 and its rpm range is from 1800 to 4800. Which sounds great it has pretty good lift, will pull from real low to the max rpm a daily driver is going to see. I just hope the idle is lumpy enough for my liking. Do want this thing sounding too tame
I am hoping with the 14892 cam, about 9.2 to 1 compression, DUI, good exhaust, ect I can hit some where close to 250 hp.
One more question i had at what point to you have to start using a taller valve cover or spacer? will stock cleveland valvetrain fit under the stock valve covers?