47-59 53 GMC longbed project

[Sebambam]

Hi team
i have a 53 GMC with a 228 and 3 on the tree
the truck belongs to my buddy and he had it in paint jail for over a year.

After a long thought process and deciding to use the Original Inline 6 (228)
i need your help with gathering parts for a DRIVER build , we are not to keen on originality ( besides the engine)
so we decided on a 12V conversion.

Here is just ordered a 12v conv. harness incl. the "modern fuse panel" setup.

i also ordered a Intake /header/weber kit from CLIFFORD to get a bit more performance out of the 228.
+ a HEI dizzy ( small cap)

parts/conversions i need help with

- 12V starter. is there a off the shelve GM part# i can use?
- is there a ignition /starter switch, so we dont use the foot start ?

also in terms of styling
the truck sits at OEM height but my buddy would like to get Steelies with moon caps , what size wheel and tires do you recommend?

and what way would be easiest to lower the truck with OEM suspension to give it a bit a stance ?