You don't really want to have just anyone fool with the seats on these heads,just use a decent stainless valve and you'll be fine.There are very few machine shops around that knows enough about these heads,and they can easily be ruined[this area is quite thin].A good hyd.roller would be a Lunati Voodoo pn 20110710 or 20110711 Big block cam ground on a W engine cam blank.The Edelbrock Performer is the best single 4bbl.,dual plane out there.Use this with a Street Demon 625 cfm carb on a stock stroke engine.If you ask around here,some one will be able to sell you a stock 409 crank[and yes they DO fit the block],and since you're going to replace the stock rods and pistons anyway,you could go up to around 380 cubic inches for very little more money.If you go with the stock 3.25 stroke,Show Cars sells a K-B Icon fordged piston that's rated a a pump gas friendly 10.5-1.If I were doing this engine ,I would use cam number 20110710 on the stock stroke package,the larger 20110711 on the 380 package.Headers,oh heck yes.More than likely the heads on your engine are "379's" which will run better with bigger valves and bowl work.The best small port heads are the 1147's[hard to find and expensive],the 817's[eaiser to find,much cheaper],and the 333 truck heads[cheap,but will need the larger 2.06-1.72 valves].If you decide to go with the 409 crank,let us know and we can supply the part number that you'll want for the pistons and rods.
