440 ebody with a 100 amp one wire alt from march performance run straight to my battery in trunk with i think 8 guage . what should i put inline if anything going to battery? it seems there should be some kind of protection.

The accepted rule for an 8 ga lead from the batt in the eng compartment over to the alt is one 2 sizes smaller (12 ga) but w yours being in the trunk I do not know if that changes that requirement.

With the battery in the engine compartment the alternator is run to the battery because that's the shortest distance between the two points. However, in a trunk-mount case you'd be better off running the wire back to the hot side of the starter relay or to the battery hot on the starter. That way you have no extra wires running to the back and virtually no resistance front to back either.

What kind or protection are you talking about ?

i didnt know if it should have some kind of inline fuse or what, and if so what size?

I was wondering that too where is the main feed routed to the starter. I agree w Stanton & run the 8ga from the trunk to the starter relay batt stud then an 8ga from there to the alt & protect that line w a 12ga FL. then the Q is do you want this main lead from the trunk forward to be hot all the time or disconnect it in the trunk w a (furd type but constant duty) solenoid not a parts house furd type.(they wont handle constant "on") EDIT made a mistake, the cables from the trunk to the starter need to be much larger than 8ga like double ought (00) then 8ga from the starter relay to the alt protected w the 12ga FL

so you mean i should have my main hot for my starter and my 8 ga for the alt run from the trunk batt to the main lug on starter relay. then take my 8ga with a fusible link over to the alt. i understand that part but you lost me with the "furd" solenoid constant duty whats that mean?

Main hot (00) from the trunk to the fender starter relay batt stud then an 8ga from that stud over to the alt (protected w a 12ga FL). some people prefer to disconnect/connect the "main hot" at the trunk battery with a solenoid so that this line is not "on" all the time which could have catastrophic results if something sharp in the route from trunk to front would cut the cable or if something up front would develop a dead short and the solenoid commonly used for this in the trunk next to the battery is a ford type that originally was on the fender on most early (of our era)fords. However the ones commonly sold in parts houses are made for intermittent duty (like when the average furd takes 2 minutes of cranking to start ) whereas one for this type of app will be "on" all the time the eng is running so an aftermarket "constant duty" ford type is needed. Myself I never sweated having the big cable running to the relay hot all the time even though I am as safety conscious as the next guy and I insulated all sharp edges very well when I routed it but some prefer it switched and some racing classes require a manual cutoff switch mounted outside the rear of the car by the bumper to interrupt the negative cable to the trunk floor.

now i understand thank you for your time you were very helpful

I used a 1 wire alternator to clean it up under the hood. The first feed wire off the alt goes to a power dist block under the hood that feeds relays for headlights and etc, I used the relay box from a 97 intrepid. A second wire off the alt feeds a power distribution block which is linked to the battery (in the trunk), this second block also powers up the fuse block under the dash. Power from the battery to the starter runs inside the car and is hot only in the cranking position and in turn there is only one wire on the starter. The connection to the battery, relay box and distribution point are all protected by fusible links, a fuse is can't take the same abuse a fusible link can and is not a good substitute.

GTXKen ... what are you using for a starter relay and where is it installed?

The stuff at this link really explains how to safely do a trunk-mount battery installation

http://www.madelectrical.com/catalog/tm-1.shtml