So I took my heads to a guy that does porting he told me that he would port them for me. But what he told me is that he would do a valve job to accomadate a set of 2.02 and 1.57 valves along with the swirl where the intake valve goes through and also the valve seat piece that had that lip under it. Bit he told me not to waste the money on port matching the exhaust to my headers because the valve will only let put so much and the hole will only accomadate to that valve so there would be no need to port match my 1 and 7/8 headers. Also he said I didnt really have to port match my fast 102 intake to the intake ports on the heads. Is any of this true? The guy gets alot of business and works on Sprint cars and things like that and hes basically doing what texas speed would do for half the price. But the exahust and intake ports just didnt seem right to me wouldnt you want to open them up a bit? This set up is going on a 6.0 bored .030 over to make a 408. So I didnt wany to spend 1600 plus for a set from trick flow or somewhere so i figured what I had I could get close for what I had around the garage. But what do you guys think?

 

Sell your 243s and get MMS 235s, AFR 230s, or TFS 235s.

 

This^^^

 

can I ask why?

 

I'm guessing because you have a 408, which will allow you to run some better heads and make more power. Nothing wrong with those 243's, it's just that they are not nearly optimal, and will be leaving a fair amount on the table

 

Because it sounds like what you really want is beyond the capabilities of the 243's

 

so what would you recommend for a basically street 408. I don't really have 2k to spend on heads lol

 

^ Any of the heads previously listed by Navy.

 

The ones that were mentioned are some of the very best and will make a good bit more power. With that said only you can determine what's best here based on your goals and budget. Know what I mean? And again there is nothing wrong with those 243's...just not optimal

 

For a 408 on a budget consider a set LS3 heads and an LS3 intake.

 

I talked to the guy and he said he can get the flow of the heads similar to what tsp amd ai amd all them can do and he said that he can provide me with flow sheets to prove it. Would you guys think that would be good enough?

 

Which exact heads is your guy comparing them to?

 

Listen to Navy.... you can just about buy a set of TFS as cast heads for 1600 dollars.

 

meaning if I sent them to ai or tea he said he can at them to flow the same. Not Like an aftermarket head like the 235s but like the 243 ported buy ai or tea

 

you mind sending a link cuz I cant find any less then 2k lol. I have the springs rockers and seats and i have a set of Manley 2.02 and 1.57 valves already

 

 

Briantooleyracing.com

 

ok great found them. But if I want to use ls1 rockers with the trunion upgrade dont i have to have the powdered valve stuff or will the stock bronze be ok?. And what cc would you recommend?

 

Stock valve guides are iron, NOT bronze. They are available on TFS heads also

 

Your CC size choice your pistons of choice, head gasket thickness, your desired compression ratio, etc...