most aftermarket heads you have to "clearance" pushrods, most say it in there instructions, last time I used a rat tail file with grease on it to catch chips
all parts are sold as is, all parts are considered used no warranties or returns paypal/check/money order, shipping is from zip 02891, buyer pays paypal fees 24% IRS 1099A plus 3% of part price, check/money order preferred site is not monitored 24/7 there might be a delay in response
