Do you guys have a good source for stock rebuilt 1.8l motors? Checked a few you-pull it yards and no miatas around, craigslist has been a bust as well

Unfortunately Miatas are not common in pick-a-part lots, as they usually pay by the pound. The Miata doesn't weigh much, and has lots of valuable aluminum bits.

Herp derp you have a 1.6, my post is useless.

currently have a 1.6l

is eBay my best shot?

Ebay or trolling forums for a part out.

Isn't Planet Miata near you? They often have BPs.

They are close but kinda high and only sell long blocks, not complete assemblies; since I am doing a swap wouldn't it be in my best intrest to buy a complete engine with all sensors, accessories, manifold etc?

Yep it would. :)

Craigslist, local car forums, miata forums, etc. I found mine on a local forum and got to pull it from the car myself. 99 motor with 150k on it for 250 bucks, ran like a champ when i drove it before pulling it and put down good compression numbers. I'm dropping it and boosting it now :)

Decided to go with a 1.8l motor, found one for sale online and purchased it today, should be here the end of next week/early the week after. Now I need to find a new manifold for my setup

Decided to become a 1.8l elitist and because I pulled the motor it made sense to just keep pulling things so this is where I stand now:

https://www.miataturbo.net/attachmen...ine=1365384644

https://www.miataturbo.net/attachmen...ine=1365384644

https://www.miataturbo.net/attachmen...ine=1365384644

My plan from here:
1) Coolant reroute with Begi spacer, kia waterneck and GM big hose
2) Build a manifold similar to what I had but schedule 40 mild steel (Swain Tech white lightning?)
3) Minor wire tuck to clean up engine bay
4) Clean and paint engine bay
5) Patch rust hole in the floor at the passenger side (what gauge material should I use here?)
6) Do some seam welding as outlined in other posts
7) Clean up under dash and wiring, remove unnecessary items (what can I remove if I want to keep just the ability to run the defroster?)
8) Paint passenger area after other items are complete


Those are the items I can think of, anything else you guys wish you had done while it was stripped down? The car is mainly used for fun drives on the street and autox, would like to get into track days and hill climbs down the road