[KTL]

Curil T on the base gaskets is sort of a belt and suspenders approach to double ensure there's no leaks. But in my limited experience the Curil T is a bit overkill. I've seen three 3.2 Carrera top end jobs that not only reused unbroken dilavar head studs (only disturbance they saw was loosening of nuts for head removal & tightening head nuts for final assembly- studs were left in the case) but also the base gaskets under the cylinders were not replaced. They sealed again OK. I know this because one engine was my '87 done in '06, another is a close local friend's '87 done recently and the third is a friend's '88 done in '06 that I got a close look at in 2014 when he asked me to help him sell it.

My point is, using new base gaskets like you're doing is going to seal good due to the crush/squish of the new gaskets. So the Curil T isn't a must. But it's not going to hurt anything if you do use it. Just don't use it on the crankshaft radial seals!