Welcome to the forum !
Good suggestions Chiphead on this type of build I'd say...
Don't forget to refer to Jim Hand's book for tips and tricks and using as many factory parts and his tips as you can! Good rods, pistons, machine work and block prep are obviously a must. Sometimes you can find nice prices on perfectly good used parts too, sometimes offered for sale on this board.
Good luck with that 68, post some pics !
