So apart from valve shrouding, has anyone seen any reason no to put these on a 4.280 bore? if the lift is kept under .600 it should be all good?

I mentioned this in a prev thread and the guy from trickflow came back with it would fit, but they just speced the larger bore size because of the 2.19 inlet valve... no other tech explanation other than "because"...

them being 10% off at summit atm is a deal clincher for me, will have to see if i can generate the coin b4 they go off special though, 5 days argh (and if they have any left!)

Edit: ahh (expletive) it, Im going to blow something up in the trans or the diff if i do use these guys, too much power, too much compression, too much stall needed. Im going to stick with the sidewinders, 500 ish hp is enough for my build/budget.

Still would like some opinions on the idea though

We ended up honing the valve guides slightly to provide "racing clearance". The valve clearance was "pass car" tight right out of the box. Everything else looked good. We swapped out the Ti retainers for some steel retainers. The steel retainers are only $45 and they won't get chewed up by the damper. I'm pretty sure the engine will still spin 7000 rpm with the steel retainers so no need for the lighter weight components. If we run into a float issue then I'll install some tool steel retainers.

Engine is ready to fire up. Should have some data after T-day. Baro is 30.15 and outside temp is 45 degrees so we're looking at some good air density numbers for dyno testing. Uncorrected numbers should be really nice.