John, don't know the answer to that, never checked an XE cam to see what the base circle was?
I know that the Crower 60919 cam is very, very close to the original RAIV camshaft. Crower juggles the specs slightly, showing it to have 304/314 instead of 308/320 advertised. It shows the same .470" lift as the RAIV cam. The list the .050" duration at 231/240, and the cam card says is on a 113LSA, not 112 as listed on their website.
It's a very good choice for the 455 engine. I like to see 10 to 1 SCR with it, but it will work fine at lower compression ratios.
Our 455 engine made 455.4 hp with it using 232cfm 6X heads, iron intake, q-jet and stock HEI distributor. With the KRE heads it made 494hp, both engines made peak power at 5600rpm's.
At the track we went as quick as 11.64 with that cam, at 3760lbs race weight......Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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