Well those struts basically replace the support of having a "FULL" type bell housing,like a 727.. a 273 2 bbl should be ok but ya technically I would put em on.. SORRY> Years ago in my 68 camaro SS RS I was running a 402 and the turbo 400 broke feet before the finish line. It also has, like I would call it, a 1/2 bell housing. Besides the mess it made what a mess it made. FOOD FOR THOUGHT DAVID __________________________________ Yahoo! Mail Stay connected, organized, and protected. Take the tour: http://tour.mail.yahoo.com/mailtour.html