Quote Originally Posted by tango View Post
Yes Pat the 80's Corvette only L98 Aluminum G.M Heads and TPI Manifold are the 1986 and Early Bolt angle . But I am sure you know about the 1987 and Newer F-Body / Passenger Car and Truck Cylinder Head and Manifold Bolt angle .

As for Valve springs I know the ones you use . I bought a set from you they are 125-130 Lbs at 1.700 install . He's talking about Iron Eagle Heads with what he calls Huge Springs . And with out known the part# of them Dart Heads it's anyone's Guess on a 1988 F-Body TPI intake bolting right on . But if you go ahead and just bolt on them Dart Heads with them Huge Springs may as well put Matching Huge 7/16" Screw in Studs Guide Plates Heavy Wall Hardened Pushrods Billet Steel Timing set and all the rest of that over kill of a Valve Train that you don't need for a Mild street Engine . Then why run Hydraulic Roller Lifters when Mechanical ones will give you more H.P power ?

Then after you get Done Bolting on all them High End Parts and Running all the Valves . Then see how that 1988 F-Body TPI Intake Bolt up . After spending all that Money and still going up Hill all the way on this Build . Just Google SB Chevy Tango and I will be more then Happy to help you Build it Right the 2nd Time for Less -> Roller or Flat Tappet COOL
As a swap meet vendor for over 20 yrs and buying auctioned used and blem Iron Eagles the stats are in favor of them being later than 1986 set of heads.Like you said,they are somewhat more rare.I am taking the fact of his yr car being what it is,the heads are a match.Btw,two models of those heads have self centering rockers not needing guide plates.

Come on Tango-it's give and take ant it???.