Re: 408 stroker
What are you towing? Weight/size wise?
A 351 Cleveland makes a great tow engine and these additions help:-
a small cam - I found about 2nd or 3rd smallest, plenty of torque, more power through whole rev range and an increase of 2 - 4 mpg.
Tri Y headers or similar - whatever design they are, small tubes.
Dual plane manifold - alloy if available to help shed heat.
600 v.s. Holley.
If auto, good convertor (11") and shift kit. Good sized trans cooler.
Good radiator system, maybe 2 elec. fans - never needed them but could be handy.
Small port stock heads would be fine (not 4v).
A mate has a F100 for towing ski boat. Used to have a mild 351, cam manifold, headers.
He put in a mild 460 and increased fuel economy and suffered less stress on highway.
The last bit might sound silly but you will have been in the situation where you go to pass a car and the d/head doesn't want you to overtake so he speeds up when you're beside him so you have to go back in behind him.
I've spent a lot of time in underpowered tow cars and overweight trailers with no brakes in the early days and it makes good trips not so enjoyable.
They guzzle fuel, won't even hold 100 kmh into wind and you can't overtake.
I would have given my eye teeth to have a stroked 351 to tow with.