Should it be safe to take out 2 screws from the timing chain cover and install a new timing tab without causing a leak?

 

Should be OK.

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"So many Mustangs, so little time..."
ICON Motorsports

 

I did it on mine last june and have not had any leaks since.

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82 Camaro:
350, Erson cam, ported heads, Crane Hi-6 ignition, Accel supercoil, Comp Cams 1.6:1 rocker arms, Turbo 350 tranny with 2500 stall.

 

I third it. Not leaked here.

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1984 WS6 Trans Am Hartop
Former L69 Car under restoration
1984 Trans Am T-tops
4-bolt main 350, performer intake, headers, Holley 650, T-5, hayes clutch, dual elec. fans and 3.23's.
Daily driver and restoration
13.98 @ 101

 

Thanks... I'll go for it then...