[Old Guy with 87 GT]

informative topic

srv1 ....i can't help thinking that mechanical lifters are a little overkill for your application though.........although theoryeticly mechanical lifters will last longer ,you will have to adjust lash more often

if your planing on using pedistool rockers then definatly don't go with mech lifters ...to much of a pain to adjust ........even with adjustable rockers ,its still a pain to adjust them (efi car +you have to remove upper to get valve covers off)

i'd recommend using hydrolic .....even with stock replacements they'll still last years and you won't have to adjust them (mine have over 200,000 on them and they still work ).....the stock hydrolics should last well over a hundred thousand miles easy

seems like the only benifit to mech is the rpm potential ,hydrolic lifters are pron to failure at high rpms and they limit your rpm potential(they floate at high rpms)

with your combo(6200 rpms -stock limiter) i'd say go with stock replacment roller lifters

can't help much with the mass air meter.....mine,s still speed density
i think you'll be allright with the 19s for now but if your getting a cam or heads down the line you'll need to go bigger eventually