Originally Posted by willwren
I'll start by asking why you think you need the HD?
I've not seen an L27 or L36 shatter a trans like an L67 yet. I'd go for a standard rebuild with all the updates, then add a shift kit. Your trans will last far longer than the original.
VERY good question.
Going to be doing a series of mods to the engine. Polished LIM. Something with the intake. Low restriction cat. Maybe even rockers. So, I will be putting out more power than a stock L36, and I was just figuring that the HD could give me more room to have some fun with it without breaking things. If I have to do a rebuild, I only want to do one!
All the updates and the shift kit are in the plans already. Would be nice to go from the 2.84 (?) to a 3.06 also. Way too tall a gear for such a heavy car!