'68 4-speed cam?

RustyRatRod said

Much as I like Rick, he's wrong here, IMO. Faster rates of lift may equal more power, but they beat on the valve train. Those 45 year old grinds still work today. Ask any Stock or Stock Eliminator racer. Those slow rate cams are easy on the valve train and make things last a long time in a street car.

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Not that I always agree with Rick E. there is no comparison if you're referring to NHRA or IHRA Stock Eliminator entries. The cams they run have much faster rates than the XE line, the Lunati line, or anything street oriented from anybody. Look at the claimer lobes and you'll see what I mean. They cannot exceed factory lift but duration is wide open and they make use of it by slamming the valve open and closing it fast while setting it on the seat without bouncing.
The '68 4sp cam is good, but "slow and steady". The OP can do a bit better, and get more driveability with something more modern. Not massive, but modern. the XE268 runs great with the Comp 901-16s which are a drop in.