Well---------You adjust the valve by pushrod length and/or retainer/lash caps------Bore spacing is different, and manifolds available are compatable just for NASCAr deck heights without spacers or hand fabbing something. Funny that rocker covers are available but super expensive also--------
oil control to top is very specific and well engineered, coolant flow control outta sight-------Can't wait to get project done--probably will use at Bonneville Salt