Flat tappet to roller lifters--older block

[chazmanaz]

i'm freshening up a block from 86 that had flat lifters. trying to use some parts from a HO block. The 86 block doesn't have holes where the dog bone tray is held down. Can I still use the roller lifters without bones and tray? What are my options?
Thanks

 

[Noobz347]

I don't know what block you have. An 86 Mustang block is a roller block.

 

[chazmanaz]

Block is from a f150

 

[AeroCoupe]

If the bosses are there you can drill and tap the holes but it will hit the cam bearings. General rule of thumb with the F150 5.0 blocks is 1985 and up are roller blocks and they used flat tappet cams in them until about 1994.

 

[chazmanaz]

Yeah, found a good video on YouTube. Now I just need to find my spider to hold the bones.

 

[Noobz347]

https://www.cjponyparts.com/ford-performance-roller-camshaft-installation-kit-302-351w-1985-2001/p/M6253A50/