Valve lifters…solid/hydraulic/roller tappet/flat tappet?

[CHANMADD]

The motor that I built can live...believe me at 8000rpm all day long.I have built a lot of race motors in my time. The bottom end determines whether or not the motor is going to live at high rpm or not, and the balancing is extrememly important when a motor is expected to live at high revs. Besides having the correct crank and rods, the pistons and all the reciprocating components all need to be correctly weighted to each other...the balance does not simply mean that the crank spins without a vibration. The complete package ,like cc'ing the heads, combustion chambers and ports, not that they just look nice ,but they all need to be exactly the same.
Most all the builders I see here are new to this and do not grasp all that is involved in making an engine live at all rpm's. Most seek highest horse power to put in these little cars that is actually overkill completely.Like expensive ignition systems that do nothing extra above idle..????.
I have taken apart many "Proffessionally Built" engines that don't perform right because they were not properly balanced/blueprinted, even to the point of cracking bell housings, that are blamed on everything else. Overkill is not always the correct answer.
Likewise I do not like to run to much tire , so as not to strain the driveline....I would rather spin the tires than break a sideshaft or driveshaft......which I have seen more than once,and inevitably leaves one on the side of the road.