I bought these holly sniper valve covers from lmr cuz I need tall valve covers but I just bought them cuz only thing i saw available for efi tall anyone running these with efi. It carberated? Also I’m having issues finding bolts anyone deal with this for a 302?
My guess is you will need to get some machined cap screws to fit the valve covers. Can be had at most hardware stores and it if were me I would get stainless steel as those areas will hold moisture. You can get some all thread and use that to determine length if you have not other way to measure. Some folks do not get along with tape measures...