generaly your better off going for hydralic unless your upping the RPM
most hydralic tappets won't present any issues till past 7krpm al lot will take bursts of 8krpm
on an 8valve in stadard form there is no advantage to solid tappets, the ports arn't that keen to flow at high RPM so theres no power to be had revving there, and the valves tend to bounce anyway.
so to go pull high rpm you need light valves + lifters ( the std vs solid lifters arn't light ) and some stiffer valve springs. top tat ot with a good porting job so the new found rpm's do something.
just as you think youve finished it's time to pull the bottom end apart and fit ARP bolts to the big end caps as std rod bolts don't do 8000rpm
