Thread: 400 tpi w/ vortec heads?

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well if it work for you that great . but for me lifters are $ 268 drop in or less the new oems are about 130 with added time grinding drilling and taping as the customer would pay me to do this . i just buy the retro lfters and keep going

i only paid $85 for new lifters on bay

This is straight from Chevrolet Division.....
"Do not try to modify either the heads or the intake manifold to try to make the Vortec heads match up to a standard 12-bolt intake manifold. The ports will not match up. You must use a Vortec style intake manifold with any Vortec style cylinder head."

That tells me that the '87 TPI manifold will not work with the L31 heads.