Go buy yourself a new timing cover. Another issue maybe the dowels not fitting properly in the timing cover to block. As mentioned, crank seal, Water transfer tubes maybe too long now, bolts to long, mismatch oil pan gasket and bolt holes, pulley and fan alignment, What about space behind timing cover to cam bolt head. What about the fuel pump arm alignment. Make sure to seal the coolant holes on both side of the timing cover gasket when installing. And the rubber dough-nut is nice and thick for the water crossover. Check with Tin Indian, or BOP, they have thick ones. I always put a little sealer on each side of that rubber dough-nut. If that doesn't work for port alignment separate the water crossover from the intake.
https://www.tinindianperformance.com...ng-cover-seal/
https://www.tinindianperformance.com...-cover-late-1/
https://www.bopengineering.com/A_Pon...ooling_1.shtml
Just thinking out load here. No offense intended.
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68 Firebird. IA2 block, 505 cu in, E-head, Solid roller 3650 weight. Reid TH400 4:11 gear. 29" slick.
Best so far 10.12@133 mph. 1.43 60 ft.
76 Trans am, TKX .81 o/d, 3.73 Moser rearend,
468 with KRE D-ports, Doug headers, 3" Exh.
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