When I got my engine it was stock. I put on my truck and started it with no problem. But now I got my ported heads on it with a bigger cam roller rockers and I cant get it started the engine is to heavy to turn and it wont start I drained three batteries and I dont know why. Could some one please help

Is the distributor properly timed?

Is the distributor properly timed?

Yes. I'm going to take it apart and check the timing chain I think that could be the problem. but I dont know why it wont turn when i crank it it wont give a complete turn and the baterie would die in like 6 to 10 tries

Do you have suffiecient voltage getting to the starter? Does it have good grounds?

Do you have a good battery with decent CCA(cold cranking amps) to turn it over? I'd recommend 700+.

Do you have suffiecient voltage getting to the starter? Does it have good grounds?

Do you have a good battery with decent CCA(cold cranking amps) to turn it over? I'd recommend 700+.

I am using the same battery that I turn it on with before the only way it would turn is if I put two batteries to make 24 volts and the cca on the battery is 840. The problem would be the ground I only have one wire going to the block I will put one going to another place thank you

it wont start, or wont crank fast enough to start, or ?

whats is the exact symptom ?

if its not cranking fast enoguh then it can be alot of things including initial timing set too far advanced, bad cable or connection somewhere, bad starter, bad battery, etc