What do you guys think of the speedmaster bare aluminum heads

don't send them to me I'm long retired
find someone with experience with those heads and what they typically need out of the box (like if they habitually come with tight guides)
Start with PRH- what he says is spot on
openended pushrods work fine on LA engines, amount is small If adjustable rockers get ones with cups on the adjusters- but others say cup end pushrods, ball adjusters work just fine
with stock rockers the pushrod oiling helps with pushrod push through the cup problem
since you asked I'd first check the concentrically of the guides and seats, fit the guides, I od hone the valve stems to check for bulge and bow
some valve stems are like files on the guides they are so bad- but usually clean up after a few strokes with the hone
check the throat to valve size and see what needs to be done based on what PRH said above
remember to get your geometry mostly correct B4 ordering pushrods