http://cgi.ebay.com/ebaymotors/5-3-G...QQcmdZViewItem hey i was just curious as to what i would have to do in order to make these truck heads work on my car to get around 450 rwhp with a torqer two cam would it be worth buying these or buying them from a company that has already prepped another set?

 

If you plan on using those you'll need to replace the intake valves with something larger than the stock 1.898" and of course a complete valve job.
I bought a set and had a buddy of mine port them and put new seats in then set them up with 2.02" intakes and stock dia (1.575") exhausts...if you can get the machine work done cheap and get them prorted and flowed I'd say go for it. If you want guarenteed power I'd say buy some off the shelf with proven numbers.

Some of the venders will take them and CNC them for you...that might be a plan somewhere in between. But then again some of the vendors here have some pretty sweet deals on complete head packages.

 

You can buy those and have them cnc'ed and a valve job from TSP and then get the their prc spring kit and you'll be ahead of the game money wise

 

look in to TEA they do some sick work and their flow numbers are outstanding

 

not gonna get into a pissing match about who cnc's better. The point is $75 for 5.3's is a good price and can be worked with to make a good head. Mine are from TSP and they flow every bit as good as Tea but for less money. Go with the better deal. You'll need gaskets and a few other things and TSP will work with you on the pricing of it all. this is my advise. Call TSP tell em Blanco sent ya.

 

SO these heads would be ok or any truck head for the 5.3 ??? if not what casting numbers? and would i need ls1 5.7 springs or ls1 5.3 springs and how much should these heads be milled? and would there be any problems running a torquer v2 camshaft with 598 lift

 

Call Texas Speed and tell them you have a set of 5.3 heads you want ported and polished and they'll tell you all you need to do to them. You'll need valve springs to match your cam choice. You dont need to mill them at all.

 

Thanks for all the help are there any specific casting 5.3 truck head numbers or are they all the same?