trickflow heads,1087 cam,and the stock ol'302

lift is only part of the equation. What he really needs to check is the duration. And even tehn i'd still clay it to make REALLY SURE, you never know

you will probably need to fly cut the pistons, remember the valves in a trick flow head are also "twisted, rotated some" compared to other aftermarket style heads. duration is the big key, the clay test is a no-brainer that will tell you exactly how much piston- valve clearance you have i would say an 1/8 inch would be fine, remember to use a solid lifter to clay check, take an old roller lifter, pull the retaining clip out and its guts and fill it wil some steel flat washer until its full to where you can put the top of the lifter and clip back in, this has been a real reliable mock solid roller lifter and should give you an accurate reading. its worked really well for me in the past. 1.7 rockers compared to 1.6 rockers will give you about .030 more lift. o-ring will probably not be necessary.