Oh dear God! 318 stroker

slick69 said

Hello I'm new here and this might be the end of me for even bringing this up but...... after a long search on the web I have not found what I'm looking for. I have a LA 318 that is sentimental to me so it is what it is. I am looking to stroke it 340-349 Cid. No more no less. I see a lot of stroker kits to get 390 but it's not what I'm looking for. I understand that this is a dumb thing to hash through but any help would be much appreciated!

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I understand the idea, but the economics are just not there. For the cost of an oddball crank and custom pistons, you would be better off with the teen built right with off the shelf components.
I would recommend searching and watching David Vizard Powertec 10.videos on porting and the Mission Impossible build initiated by Uncle Tony. David has a few just on lightening and prepping the rods and crank, much of which you could do at home.
Cam selection is critical. I would start with David's LSA determination formula.
To lighten the valvetrain, check a video he didon that with more to come. Magnum valves with 8mm stems may lower weight, but DV is looking to install Chev LM7 LS valves. These are 20g to 25g lighter. Beehive springs and retainers will reduce valvetrain mass more. Check the videos, there is a wealth of information there.