Letter cams....?
 

Who here has specs on letter cams
B303, E303 etc...

There seems to be a lot of questions and concerns on the letter cams.
I don't know much about them myself so please post any/all information about letter cams in this thread.

Thanks :tup

Ford Racing Performance Parts [M-6250-B303*]

PART NUMBER ENGINE ROCKER
RATIO INTAKE EVENTS
(0.050') EXHAUST EVENTS
(0.050') DURATION
(SAE) LIFT
(INCHES) LOBE
CENTER
OPEN CLOSE OPEN CLOSE INT. EXH. LOBE VALVE INT. EXH.

M-6250-B303*
(1)(2)(3)(7) 1985 and Later 302 Roller Cam 1.60 5° BTC 39° ABC 49° BBC 5° BTC 284° 284° .300 I .480 I 107° 117°
224° 224° .300 E .480 E

M-6250-E303
(1)(2)(3)(7)
(8) 1985 and Later 302 Roller Cam 1.60 0° BTC 40° ABC 40° BBC 0° BTC 282° 282° .311 I .498 I 110° 110°
220° 220° .311 E .498 E

M-6250-F303*
(1)(2)(3)(4)
(7)(9) 1985 and Later 302 Roller Cam 1.60 4° BTC 42° ABC 52° BBC 6° BTC 288° 288° .320 I .512 I 109° 119°
226° 226° .320 E .512 E

M-6250-X303*
(1)(2)(3)(4)
(7)(10) 1985 and Later 302 Roller Cam 1.60 5° BTC 39° ABC 49° BBC 5° BTC 286° 286° .339 I .542 I 107° 117°
224° 224° .339 E .542 E

M-6250-Z303*
(1)(2)(3)(4)
(5)(7)(11) 1985 and Later 302 Roller Cam 1.60 7° BTC 41° ABC 51° BBC 3° ATC 290° 290° .345 I .552 I 107° 117°
228° 228° .345 E .552 E

I hope that helps