My 89 IROC currently has a carb but I want to go back to the TPI. I was told guys here really know their sh*t so here I am. I have to HSR's but would like to know if you would recommend either or will I have to get aluminum cylinder heads to get either to work? If you have any other suggestions let me know. Here are the links to the 2 HSR's:

http://store.summitracing.com/partde...5&autoview=sku


I took down one of the links because it kept going back to the part above. The HSR part # is HLY-7540P and is $579.98.