Ok, how much will I gain?

one other thing on swapping to a roller motor and staying carberated. the roller cam requires a hardened distributor gear on the distributor. the only factory car that ever had a carb with a roller cam is the 85 mustang gt 5speed. you can get these manufactured from any parts store for around $30-$60 they work with the duraspark II box and can work with a msd box.

 

I have an after market HEI distributor to go in it. I'll need to make sure I have the right gear on it.

I have no plans to race this maverick at all. I just want it to be interesting to drive. Will I miss the performance above 5200 rpm, if all I ever use that range for is passing a car on the high way?

 

Yeah I forgot about that detail, glad it was mentioned...

A stock C4 or AOD will shift at around 4600 RPMs, I doubt it... I would want the HO cam as a minimum...

 

That's what I love about this site, people are actually helpfull!

 

Yes, yes they are.

 

There is nothing to be gained by putting 351W heads on a 302 unless they are early model 60, 70 heads. If you do you may want to mill them slightly. I think the early model heads have around 60cc combustion chambers. You would also need different head bolts or special washers, both readily available from Summit Racing. Honestly if you get some late model GT40 heads for the 302 they are probably superior to the early 351W.

 

I passed on the two engines. Neither was a best choice and no need to rush to jump on the first day of the search.

I haven't even had had a chance to check with the local wrecking yards yet.

 

ANY 351 head is better flowing than the E6 swirl heads that graced millions of mid '80s 5.0... These heads were used on all the Lo-Po 5.0 fuel inj engines, from '86-'91 ... The E7 are worth approx 25Hp over the E6...

 

How many horse gain over a stock early 70's head set up?

 

Simple rule..


for every $1,000 = 100 HP

Or so ive been told over the years

 

Watch switching an injected engine to carb. It may not have a drive for the fuel pump at all if it's injected. Also watch mixing and matching timing covers and water pumps and fans, reverse rotations tuff will trip you up occasionally.

SPark

 

Years ago the early 351w head swap was about your only option for SBF engines. They had larger valves and ports, although the exhaust ports greatly benefit from any porting. They are probably good for around a 20HP gain. If you are serious about performance get some after market heads. If you happen to have a set of early 351W heads and are doing a budget build, then use them. This is what I will be doing.

 

In my latest search by phone (so I haven't seen it), I found a '90 Mustang 5.0 HO. He had an AOD as well.

So far,

 

I just acquired an `87 5.0 HO along with an aod transmission!

Next question - I know I am replacing the intake, oil pan and timing chain cover. I'm guessing I need to go ahead and replace the head gaskets while I'm at it, right?

From what I've read here, I understand it's a given the the shorty headers still attached are a no go. What a shame.

 

lol..."smog anchor"