The continued reports of flat tappet lifter failures and the suggestion that there may be metallurgy issues with many of the aftermarket flat tappet lifters on the market today (whether true or not) got me thinking about retrofitting a roller cam and lifters to a big block. I know there are kits available if someone wanted to go that route, but aftermarket roller lifters are fairly expensive; small blocks had roller lifters from the factory beginning in the late 80s which are much cheaper to obtain and should fit the lifter bores in a big block. The problem I see with this is that the factory link bars are a slip on situation as shown in this picture: Build Your Own 455HP Pump-Gas Magnum V8 For Around $4,000! - Swap Meet Classified ads (at http://swapmeetclassified.com/2017/08/10/build-your-own-455hp-pump-gas-magnum-v8-for-around-4000/ ) They are not permanently affixed to the lifters and are held in place by a spider bar which bolts into the lifter valley: https://www.hotrod.com/articles/hrd...-magnum-parts-exchange/?galleryImageId=201014 It seems to me that if someone were to come up with a way to retain the link bars on a big block, the factory roller lifters could be used with an aftermarket roller cam to save some money. Thoughts?