A12- That is some nice work. Its also nice to see grassroots low buck projects. It is possible to have a set of used OEM heads that have good guides and seats. In this case a home porting job is a FANTASTIC option. Way way cheaper than even the cheapest aftermarket head and plenty good enough to make moderate power and torque. The culture of the hobby has taken a Sunday morning TV engine build turn where every engine build- even daily driver lower power street engines get aluminum heads, roller rocker arms and forged pistons.