It was right at three years ago when I rebuilt that nasty 'race' motor into the more tame version I have now. At that time hydraulic rollers were still pretty expensive and rpm was limited. Being on a budget (and we all are when it comes right down to it) you have to make choices where to spend the money. I still wanted 6000 plus rpm and did NOT want another solid roller cam (which crapped out around 8000 miles in the original engine). Hence, the only viable option for me at that time was a flat tappet. Today? Perhaps I would consider a hydraulic roller, my 1968 'service block' side oiler can run hydraulic. Bear in mind the original 65-66 blocks cannot, solid is the ONLY choice.
I ran the motor about 500 miles with the inner springs removed for break in. I have and will continue to use
oil with high
zinc content (Shell Rotella). I also use an additive(s), which has varied. Currrently STP. I will monitor the
oil market closely to see who has the best at any given time. Whats good today may be changed tommorow!
Frankly, I also wanted a solid as well for the 'soul' of the motor. I don't mind the occasional valve adjustment/check, keeps me in touch.
I DO miss the feeling of power that the old solid roller profile gave me when it 'came on the cam' about 3000 rpm. The cam I have now makes smoother power from a lower rpm to it's limit, about 6400 rpm. Surprisingly the car is darn near as fast as before, but the power output is smoother. I miss 'brutal', but there is such a downside to that when you drive everyday it gets old.