Tearing it down

Are you sure about the 340 stamping? This block has got the threads to put the retainer for the roller lifters in the valley, so i think it´s a late roller cam LA 318 or 360 - as far as i know there was no 340 made with this mods.

Michael

Good eye. 340's never had roller lifters and those are definitely roller lifter spider bosses. Must be a 87 or newer.

Tom, what casting heads are on it now?