Maybe to save some money and make for an easier/cleaner job for someone else once you find someone to do the work you are wanting is to clean the motor bay yourself using spray on engine cleaners, simple green, some old paint brushes to loosen things up and then if things look rusty or like it might be a bear to take some nuts and bolts loose,spray on some penetrating oil and let it soak and reapply and see if you can crack the bolts and nuts loose and then tighten them back down.
If you have a decent camera and phone take more pictures than you think you might need to where later if you wonder how something goes back together you can refer to some pictures you took.
On my 68 a while back I did an in car motor repaint on one side and when I took the distributor cap off I referenced with a stick how the rotor was pointing as well as fabbed up a socket and extension to reference where the vacuum advance was at. When it came time to put things back together I referred to my pictures and later the car fired right back up like it was never taken apart.
Another thing is if you are keeping originality with nuts, bolts, or whatever being in different spots maybe take one bold out at a time to clean it and on my car I wire wheeled things as far as the bolt heads and threads to clean things up.
If when cleaning you come across any factory marks like firewall markings, paint markings (inspection marks) on suspension parts, and so on document these things.
Like they say the car is only original once and the better you document things the better for later on down the road.
Another thing is some parts are not readily available so get a list going of hoses you need, hose clamps, gaskets, and so on to check availability. Nothing worse than needing a specific part only to find out you need it today and it's not available for another 6 weeks or so.
The 2022 touch up on my 68:
www.flickr.com
And this was from 9 years ago and some newer years showing what I started with and cleaning up my engine bay:
www.flickr.com
Jim
If you have a decent camera and phone take more pictures than you think you might need to where later if you wonder how something goes back together you can refer to some pictures you took.
On my 68 a while back I did an in car motor repaint on one side and when I took the distributor cap off I referenced with a stick how the rotor was pointing as well as fabbed up a socket and extension to reference where the vacuum advance was at. When it came time to put things back together I referred to my pictures and later the car fired right back up like it was never taken apart.
Another thing is if you are keeping originality with nuts, bolts, or whatever being in different spots maybe take one bold out at a time to clean it and on my car I wire wheeled things as far as the bolt heads and threads to clean things up.
If when cleaning you come across any factory marks like firewall markings, paint markings (inspection marks) on suspension parts, and so on document these things.
Like they say the car is only original once and the better you document things the better for later on down the road.
Another thing is some parts are not readily available so get a list going of hoses you need, hose clamps, gaskets, and so on to check availability. Nothing worse than needing a specific part only to find out you need it today and it's not available for another 6 weeks or so.
The 2022 touch up on my 68:

1968 Chevrolet Chevy 2 Nova 230 Engine Paint Touch Up 2022
A quick paint touch up of the one side of the motor in my 1968 Chevy 2 Nova right before the 2022 Street Machine Nationals in Duquoin Illinois.
And this was from 9 years ago and some newer years showing what I started with and cleaning up my engine bay:

1968 Chevy II Nova (Engine Block Refinishing)
The engine compartment on my 1968 Chevy II Nova needed to be restored so during the summer of 2013 I stripped the engine block and resprayed it as well as refinished the starter, radiator, wiper motor, underside of the hood, the hood hinges and springs, as well as numerous other parts. The car...
Jim