carbureted 5.7 - 6.1

cool....my 727 already has the Lokar kickdown cable which is already hooked up to the demon carb. will be ordering the flex plate and sump from Mancini.
the Wayfarer being Australian is right hand drive and has a big heavey steering box attached to the RH chassis rail. this will be removed and replaced with a rack and pinion setup. this will make the header fabrication job soooo much easier.
engine bay is same as 69 dart. going to pick up the 5.7 next weekend. can't wait.
looking at the XV intake. a bit pricier than the mod man.

any advice on where to sorse a cam and lifters etc. keen on something like the comp 273. the Hughes ones look good for the price, but can't supply a exchange core. also do i need to swap the retainers and locks if i change springs. do i need to change springs. motor is a 08.

cheers