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I saw your other post about k24 weights and responded there before seeing if you had a build thread...anyway. I'm *nearly done* with this swap. I have a spreadsheet of everything I've used on my swap down to single bolts. Once I get the car running I'll have a huge write up with that spreadsheet, links to videos/posts I found helpful, full documentation of component weights(Honda vs Datsun). If you have any specific questions I'm happy to help. I'm also going to be selling mounts and while they won't contribute to meeting your $4k goal, it would save you a lot of time. My swap was done in Solidworks from 3d scans in an attempt to minimize body modifications. I did need to notch the trans tunnel reinforcement to clear the shift linkage tube on the s2k trans and the hood latch bracket so I can remove the valve cover. Otherwise the engine is in the ideal location with the oil pan at the same level as the L series pan, just enough room to remove the water housing, and the shifter is in almost the exact OEM location. I welded the top of the Z shifter to the S2k lower portion and used the OEM rubber shift boot/seal ring. I considered the same transmissions, but ended up with the S2k trans as well. I thought it might be a bit cheaper since the adapter flywheels for the BMW, BRZ, and CD transmissions are spendy, but the S2k clutch kits are quite expensive. I paid 750 for the trans with shifter, 525 for the clutchmasters flywheel, 240 for the adapter, 360 for an ACT disc, 155 for a OEM Honda TOB, 150 for a OEM pressure plate, and 160 for the missing clutch slave, slave boot, fluid, misc little parts. Since your K2F adapter didn't come with bolts, here's a pic with notes. I ended up sanding most of the 52/42 length bolts to 51mm. They started out as 55-60mm bolts, but the adapter plate is so thin I wanted the extra 1.5-2 threads vs 50/40mm bolts. The 68mm bolt also holds the starter and 7mm of thread engagement with a 65mm M12 bolt is questionable. This was a PLM adapter, I would not recommend buying anything from them. It was missing one bolt hole(5oclock) and another(7oclock) was off ~2mm. I was able to open up the lower trans brace with a die grinder. I bought most of my hardware from Bel-Metric Edit: looking at your spread sheet. The OEM coolant inlet fits, don't buy one of those swivel neck turds. The factory thermostat has a bypass so coolant continues to circulate in the engine while it is closed. Those swivel neck versions don't have that unless you buy the $200+ version from Ktuned(?). I bought one of the ebay upper outlet housings without the additional bleed neck. The bleed neck won't fit with my current setup, but for only a few $ more I'd go that route. I'm concerned bleeding the coolant system is going to be difficult. I'll know in a few days... I also bored out the outlet. The ID on these cheap ORB fittings is tiny, I think it was 24mm. OD is 32mm and I bored mine to 29mm.

Edit: Derp, didn't realize this is an engine weights thread. Nice to see another K swap Z coming. I'll have a huge write up in 2ish weeks once mine is running. I'm also obsessing over weight and have been cataloging absolutely everything which will be put in a spreadsheet and shared along with a list of every part I used. PS, that last pic is the AC compressor bracket. PS pump is on top above the tensioner.