https://www.amazon.com/gp/product/B01B94NTYO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I use this occasionally in my X backseat. I have recaros and it hooks up to them fine. Dog seems ok with it.
https://www.amazon.com/dp/B00BAQKRHY/ref=cm_sw_r_sms_api_glt_fabc_ZND4R9XEYY1G39XJQ7CY
I’ve been using this for years. The magnet is strong and you can put your phone on any metal surface. When I’m at the gym using the squat rack or machines it will stick right to them. I’m happy with it.
I've been using this vent one
https://www.amazon.com/dp/B07QMQFXRK?ref=ppx_pop_mob_ap_share
I mean it moves, especially with 700/900 spring rates, but I'm not trying to read a novel on it while driving, just use Waze.
FLYUNICE 12.1 Inch Tesla Style 4GB RAM Android 9.0 Fast Boot Car Stereo Radio GPS Navigation for Mitsubishi Lancer 2014-2017 Bluetooth Head Unit with Factory Rockford System WiFi Carplay DSP https://www.amazon.com/dp/B088G1KDVH/ref=cm_sw_r_cp_api_fab_jHaDFbJRG4102
This worked really well for me and it's very inexpensive.
https://www.amazon.com/gp/product/B07F462SXM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
If you are willing there are several books on the topic. Here is one with great reviews .https://www.amazon.com/Build-Max-Performance-Mitsubishi-4G63t-Engines-ebook/dp/B08DL4LNGC/ref=sr_1_1?dchild=1&keywords=Mitsubishi+modification&qid=1614290273&s=books&sr=1-1
However your best bet although pricey would be contacting professionals in your area.