318 driver - cam change or not?

273
.050 is useful for power but .200 is better (or .300)
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You have to convert "advertised" into .004, .006. 008 etc then you can sorta compare(or use a camdoc)
unfortunately it's the only way to get a grip on dynamic compression and dial in a low compression motor or figure how much static compression you can use, etc

for example using everyone's favorite 50 year old profile
MTC-1 melling version (they are all the same)
.050 open close dir SAE open close dur lobe valve C/L
INT. -5 ATC 29 ABC 204 27 BTC 71 ABC 278 .280 .420 112

EXH. 44 BBC -10 ATC 214 76 BBC 32 ATC 288 .295 .433 112

so we have an
intake intensity of 278-204= 74 intake close 71 ABDC
exhaust intensity 288 -214 =74 Exhaust open 76 BBDC

now that comp and the other similar cams close the intake in the low 50's
and we see that the 204-214 uses .004 and the comp uses ,006 that's not 20 degrees
Trying to make cams that were designed for high compression premium gas motors (like this one and the HP cam) just can't build dynamic compression
as for top end power 204 is not going to do it but if 204 is what you need for your build these cams give up 30-50 thou valve lift