The XE 274 cam is a LOT smaller cam than the RAIV. RAIV cams have 308/320 seat timing and 113LSA with over 80 degrees overlap. A 350 build, even high compression isn't going to fair well with a RAIV cam in it. Even in the real RAII and RAIV 400 engines they REQUIRE a lot of gear and converter to be effective. I get more complaints from folks who have installed the RAIV cam in 400 engine builds than any other.
I have next to zero experience with Pontiac 350's, as we skip right by them and build 400's, 428's and 455's. Even so, I've built GOBS of SBC 350's over the years, and typically use cams around 214/224/112 in them at 10 to 10.5 to 1 compression.
My two favorites are the old 327/350hp cam and the newer LT4 "Hot" roller cam. Both are a home-run in 355 SBC builds provided you have at least 10 to 1 compression, tight quench and good flowing heads. A Pontiac 350 build wouldn't stray to far from the same cam requirements. The Pontiac 350 has the disadvantage of much heavier internals and smaller bore, so it's not going to run with the SBC trying to do the same thing. I'd still cam it appropriately for the CID and static compression ratio, and the XE274 would NOT be on my list as a cam choice for one.....FWIW.....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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