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**Orange71shorty** · 07-25-2022, 11:51 PM

I’m putting in a 350 GM performance crate engine in a 72 K20 and it has a one piece rear main seal. Every flexplate at my local parts stores have a convex plexplate which puts the ring gear at 5/8” back of block compared to 15/16 for a two piece rear main flexplate. Should mention it’s a turbo 350 trans. I’m worried I’m going to be pulling the torque converter too far from the transmission. Surely others have put this common crate engine in? What are you doing for flexplate?

07-25-2022, 11:51 PM	#1
Orange71shorty Senior Member Join Date: Feb 2009 Location: Helena, Montana Posts: 544	Flexplate question I’m putting in a 350 GM performance crate engine in a 72 K20 and it has a one piece rear main seal. Every flexplate at my local parts stores have a convex plexplate which puts the ring gear at 5/8” back of block compared to 15/16 for a two piece rear main flexplate. Should mention it’s a turbo 350 trans. I’m worried I’m going to be pulling the torque converter too far from the transmission. Surely others have put this common crate engine in? What are you doing for flexplate?