Ok so here's my dilemma. I had a set of aluminum heads (freebies) for my motor. They were from a buddy who was doing a TR6 and sold the project. Now that I'm doing the motor I have realized that the heads have been milled alot and the intake valve is sitting just up from the deck. Too much for my liking and my budget doesn't permit new aluminum heads at the moment. So I'm going to use the stock E7TE heads until I can afford the upgrade. The cam I am installing is the Comp Cam 281HR (35-440-8). I'm thinking the stock springs may be a little weak for the cam so I was thinking about using the spring of my aluminum heads which are heavier double springs but I have no idea what the specs on them is. I'm figuring the aluminum heads would have been used with a HP cam so it may be a good swap. Anyone have any input on this? The diameter is the same but the spring off the aluminum heads is heavier and they are a little taller. Think it'll work??