ebay h-beam rods?

Define " MoPar kind of budget ".
If you want to do it cheaply , then you should be building a small block Chev.
I'm also on a MoPar kind of budget........R-3 and W-9's.
Which is why it has taken three years to get this far. :D
If you are doing a budget build they might be fine , but I would have them thoroughly checked out before I installed them.
For not a ton more , you can step into a known quantity i.e. K-1's , Eagle , Scat , Compstar etc..
I guess it would depend on what else is going into the motor to justify cutting a corner here.......if you have a lot of money in cam , valve train and heads then I wouldn't start getting chintzy with the bottom end.