The HO motors are fuel injected roller blocks. Can you look down your oil spout? If you can then you should see 1 of 2 things.

1: nothing at all cause there's a piece of metal to send the oil to the middle of the head on the valve covers or
2: someone removed that metal (we have to for some aftermerket rockers) in which case you should be able to see the roller rockers.

almost all of the 302's are HO unless they came from a truck

ps... post a pic! it helps

 

it has aftermarket weiland intake and motorsport valve covers, i am pulling the engine to freshen her up and paint the bay. so you are saying there are no HO engines prior to 88 then? Isn't this the first year for rollars

 

HO does'nt mean it's a roller (lifter) motor. Ford started using the HO scripting on Mustang air cleaners around 1982. The roller motors (really engines) came into full production in 1985 (some late '84s lucked out as well plus got T-5s to boot).

 

Doesnt HO have different firing order? So looking at plug wires in distributor you could see if its HO. But i think that the 13726548 order was used also in older engines, so that would not be 100% accurate.

What is the other firing order and when/where was it used?

 

15426378 is older 302 prior tp 85 i think and 13726548 is ho and 351w..ford had 289 ho motors in 60s...rollers were in 302s in 85 up..

 

flip a coin

 

yes but there was the 255ci motor in around 82 that was considered HO I think as well. Find the block casting number and we can go from there... I have a few books here that can solve this problem.

 

15426378 is the fireing order, and it is a 5.0 just not sure if it is an ho. ****er has way more power then my 88 that is forsure