How much is too much? Boyd’s motorworks in Gloversville built my bottom end. Dropped off the stck bottom end, new pistons, rods, bearings and main seals. $500 later I picked up the bottom end put together. That included, stipping the old parts out. cleaning. boreing the block. correctly gapping the rings, and putting everything else back together and tq’d to spec. Cant beat all that work for $500 and peace of mind it was done right. he builds 1500+hp v8’s there for some serious cars and big boats, and has been around for ever. Money well spent IMO.